Files
hermes-agent/tests/hermes_cli/test_tools_config.py
Jonathan Barket 7fe6782a25 feat(tools): add "no_mcp" sentinel to exclude MCP servers per platform
Currently, MCP servers are included on all platforms by default. If a
platform's toolset list does not explicitly name any MCP servers, every
globally enabled MCP server is injected. There is no way to opt a
platform out of MCP servers entirely.

This matters for the API server platform when used as an execution
backend — each spawned agent session gets the full MCP tool schema
injected into its system prompt, dramatically inflating token usage
(e.g. 57K tokens vs 9K without MCP tools) and slowing response times.

Add a "no_mcp" sentinel value for platform_toolsets. When present in a
platform's toolset list, all MCP servers are excluded for that platform.
Other platforms are unaffected.

Usage in config.yaml:

    platform_toolsets:
      api_server:
        - terminal
        - file
        - web
        - no_mcp    # exclude all MCP servers

The sentinel is filtered out of the final toolset — it does not appear
as an actual toolset name.
2026-04-07 18:00:01 -07:00

423 lines
14 KiB
Python

"""Tests for hermes_cli.tools_config platform tool persistence."""
from unittest.mock import patch
from hermes_cli.tools_config import (
_configure_provider,
_get_platform_tools,
_platform_toolset_summary,
_save_platform_tools,
_toolset_has_keys,
TOOL_CATEGORIES,
_visible_providers,
tools_command,
)
def test_get_platform_tools_uses_default_when_platform_not_configured():
config = {}
enabled = _get_platform_tools(config, "cli")
assert enabled
def test_get_platform_tools_preserves_explicit_empty_selection():
config = {"platform_toolsets": {"cli": []}}
enabled = _get_platform_tools(config, "cli")
assert enabled == set()
def test_platform_toolset_summary_uses_explicit_platform_list():
config = {}
summary = _platform_toolset_summary(config, platforms=["cli"])
assert set(summary.keys()) == {"cli"}
assert summary["cli"] == _get_platform_tools(config, "cli")
def test_get_platform_tools_includes_enabled_mcp_servers_by_default():
config = {
"mcp_servers": {
"exa": {"url": "https://mcp.exa.ai/mcp"},
"web-search-prime": {"url": "https://api.z.ai/api/mcp/web_search_prime/mcp"},
"disabled-server": {"url": "https://example.com/mcp", "enabled": False},
}
}
enabled = _get_platform_tools(config, "cli")
assert "exa" in enabled
assert "web-search-prime" in enabled
assert "disabled-server" not in enabled
def test_get_platform_tools_keeps_enabled_mcp_servers_with_explicit_builtin_selection():
config = {
"platform_toolsets": {"cli": ["web", "memory"]},
"mcp_servers": {
"exa": {"url": "https://mcp.exa.ai/mcp"},
"web-search-prime": {"url": "https://api.z.ai/api/mcp/web_search_prime/mcp"},
},
}
enabled = _get_platform_tools(config, "cli")
assert "web" in enabled
assert "memory" in enabled
assert "exa" in enabled
assert "web-search-prime" in enabled
def test_get_platform_tools_no_mcp_sentinel_excludes_all_mcp_servers():
"""The 'no_mcp' sentinel in platform_toolsets excludes all MCP servers."""
config = {
"platform_toolsets": {"cli": ["web", "terminal", "no_mcp"]},
"mcp_servers": {
"exa": {"url": "https://mcp.exa.ai/mcp"},
"web-search-prime": {"url": "https://api.z.ai/api/mcp/web_search_prime/mcp"},
},
}
enabled = _get_platform_tools(config, "cli")
assert "web" in enabled
assert "terminal" in enabled
assert "exa" not in enabled
assert "web-search-prime" not in enabled
assert "no_mcp" not in enabled
def test_get_platform_tools_no_mcp_sentinel_does_not_affect_other_platforms():
"""The 'no_mcp' sentinel only affects the platform it's configured on."""
config = {
"platform_toolsets": {
"api_server": ["web", "terminal", "no_mcp"],
},
"mcp_servers": {
"exa": {"url": "https://mcp.exa.ai/mcp"},
},
}
# api_server should exclude MCP
api_enabled = _get_platform_tools(config, "api_server")
assert "exa" not in api_enabled
# cli (not configured with no_mcp) should include MCP
cli_enabled = _get_platform_tools(config, "cli")
assert "exa" in cli_enabled
def test_toolset_has_keys_for_vision_accepts_codex_auth(tmp_path, monkeypatch):
monkeypatch.setenv("HERMES_HOME", str(tmp_path))
(tmp_path / "auth.json").write_text(
'{"active_provider":"openai-codex","providers":{"openai-codex":{"tokens":{"access_token": "codex-...oken","refresh_token": "codex-...oken"}}}}'
)
monkeypatch.delenv("OPENROUTER_API_KEY", raising=False)
monkeypatch.delenv("OPENAI_BASE_URL", raising=False)
monkeypatch.delenv("OPENAI_API_KEY", raising=False)
monkeypatch.delenv("AUXILIARY_VISION_PROVIDER", raising=False)
monkeypatch.delenv("CONTEXT_VISION_PROVIDER", raising=False)
monkeypatch.setattr(
"agent.auxiliary_client.resolve_vision_provider_client",
lambda: ("openai-codex", object(), "gpt-4.1"),
)
assert _toolset_has_keys("vision") is True
def test_save_platform_tools_preserves_mcp_server_names():
"""Ensure MCP server names are preserved when saving platform tools.
Regression test for https://github.com/NousResearch/hermes-agent/issues/1247
"""
config = {
"platform_toolsets": {
"cli": ["web", "terminal", "time", "github", "custom-mcp-server"]
}
}
new_selection = {"web", "browser"}
with patch("hermes_cli.tools_config.save_config"):
_save_platform_tools(config, "cli", new_selection)
saved_toolsets = config["platform_toolsets"]["cli"]
assert "time" in saved_toolsets
assert "github" in saved_toolsets
assert "custom-mcp-server" in saved_toolsets
assert "web" in saved_toolsets
assert "browser" in saved_toolsets
assert "terminal" not in saved_toolsets
def test_save_platform_tools_handles_empty_existing_config():
"""Saving platform tools works when no existing config exists."""
config = {}
with patch("hermes_cli.tools_config.save_config"):
_save_platform_tools(config, "telegram", {"web", "terminal"})
saved_toolsets = config["platform_toolsets"]["telegram"]
assert "web" in saved_toolsets
assert "terminal" in saved_toolsets
def test_save_platform_tools_handles_invalid_existing_config():
"""Saving platform tools works when existing config is not a list."""
config = {
"platform_toolsets": {
"cli": "invalid-string-value"
}
}
with patch("hermes_cli.tools_config.save_config"):
_save_platform_tools(config, "cli", {"web"})
saved_toolsets = config["platform_toolsets"]["cli"]
assert "web" in saved_toolsets
def test_save_platform_tools_does_not_preserve_platform_default_toolsets():
"""Platform default toolsets (hermes-cli, hermes-telegram, etc.) must NOT
be preserved across saves.
These "super" toolsets resolve to ALL tools, so if they survive in the
config, they silently override any tools the user unchecked. Previously,
the preserve filter only excluded configurable toolset keys (web, browser,
terminal, etc.) and treated platform defaults as unknown custom entries
(like MCP server names), causing them to be kept unconditionally.
Regression test: user unchecks image_gen and homeassistant via
``hermes tools``, but hermes-cli stays in the config and re-enables
everything on the next read.
"""
config = {
"platform_toolsets": {
"cli": [
"browser", "clarify", "code_execution", "cronjob",
"delegation", "file", "hermes-cli", # <-- the culprit
"memory", "session_search", "skills", "terminal",
"todo", "tts", "vision", "web",
]
}
}
# User unchecks image_gen, homeassistant, moa — keeps the rest
new_selection = {
"browser", "clarify", "code_execution", "cronjob",
"delegation", "file", "memory", "session_search",
"skills", "terminal", "todo", "tts", "vision", "web",
}
with patch("hermes_cli.tools_config.save_config"):
_save_platform_tools(config, "cli", new_selection)
saved = config["platform_toolsets"]["cli"]
# hermes-cli must NOT survive — it's a platform default, not an MCP server
assert "hermes-cli" not in saved
# The individual toolset keys the user selected must be present
assert "web" in saved
assert "terminal" in saved
assert "browser" in saved
# Tools the user unchecked must NOT be present
assert "image_gen" not in saved
assert "homeassistant" not in saved
assert "moa" not in saved
def test_save_platform_tools_does_not_preserve_hermes_telegram():
"""Same bug for Telegram — hermes-telegram must not be preserved."""
config = {
"platform_toolsets": {
"telegram": [
"browser", "file", "hermes-telegram", "terminal", "web",
]
}
}
new_selection = {"browser", "file", "terminal", "web"}
with patch("hermes_cli.tools_config.save_config"):
_save_platform_tools(config, "telegram", new_selection)
saved = config["platform_toolsets"]["telegram"]
assert "hermes-telegram" not in saved
assert "web" in saved
def test_save_platform_tools_still_preserves_mcp_with_platform_default_present():
"""MCP server names must still be preserved even when platform defaults
are being stripped out."""
config = {
"platform_toolsets": {
"cli": [
"web", "terminal", "hermes-cli", "my-mcp-server", "github-tools",
]
}
}
new_selection = {"web", "browser"}
with patch("hermes_cli.tools_config.save_config"):
_save_platform_tools(config, "cli", new_selection)
saved = config["platform_toolsets"]["cli"]
# MCP servers preserved
assert "my-mcp-server" in saved
assert "github-tools" in saved
# Platform default stripped
assert "hermes-cli" not in saved
# User selections present
assert "web" in saved
assert "browser" in saved
# Deselected configurable toolset removed
assert "terminal" not in saved
def test_visible_providers_include_nous_subscription_when_logged_in(monkeypatch):
monkeypatch.setenv("HERMES_ENABLE_NOUS_MANAGED_TOOLS", "1")
config = {"model": {"provider": "nous"}}
monkeypatch.setattr(
"hermes_cli.nous_subscription.get_nous_auth_status",
lambda: {"logged_in": True},
)
providers = _visible_providers(TOOL_CATEGORIES["browser"], config)
assert providers[0]["name"].startswith("Nous Subscription")
def test_visible_providers_hide_nous_subscription_when_feature_flag_is_off(monkeypatch):
monkeypatch.delenv("HERMES_ENABLE_NOUS_MANAGED_TOOLS", raising=False)
config = {"model": {"provider": "nous"}}
monkeypatch.setattr(
"hermes_cli.nous_subscription.get_nous_auth_status",
lambda: {"logged_in": True},
)
providers = _visible_providers(TOOL_CATEGORIES["browser"], config)
assert all(not provider["name"].startswith("Nous Subscription") for provider in providers)
def test_local_browser_provider_is_saved_explicitly(monkeypatch):
config = {}
local_provider = next(
provider
for provider in TOOL_CATEGORIES["browser"]["providers"]
if provider.get("browser_provider") == "local"
)
monkeypatch.setattr("hermes_cli.tools_config._run_post_setup", lambda key: None)
_configure_provider(local_provider, config)
assert config["browser"]["cloud_provider"] == "local"
def test_first_install_nous_auto_configures_managed_defaults(monkeypatch):
monkeypatch.setenv("HERMES_ENABLE_NOUS_MANAGED_TOOLS", "1")
config = {
"model": {"provider": "nous"},
"platform_toolsets": {"cli": []},
}
for env_var in (
"VOICE_TOOLS_OPENAI_KEY",
"OPENAI_API_KEY",
"ELEVENLABS_API_KEY",
"FIRECRAWL_API_KEY",
"FIRECRAWL_API_URL",
"TAVILY_API_KEY",
"PARALLEL_API_KEY",
"BROWSERBASE_API_KEY",
"BROWSERBASE_PROJECT_ID",
"BROWSER_USE_API_KEY",
"FAL_KEY",
):
monkeypatch.delenv(env_var, raising=False)
monkeypatch.setattr(
"hermes_cli.tools_config._prompt_toolset_checklist",
lambda *args, **kwargs: {"web", "image_gen", "tts", "browser"},
)
monkeypatch.setattr("hermes_cli.tools_config.save_config", lambda config: None)
monkeypatch.setattr(
"hermes_cli.nous_subscription.get_nous_auth_status",
lambda: {"logged_in": True},
)
configured = []
monkeypatch.setattr(
"hermes_cli.tools_config._configure_toolset",
lambda ts_key, config: configured.append(ts_key),
)
tools_command(first_install=True, config=config)
assert config["web"]["backend"] == "firecrawl"
assert config["tts"]["provider"] == "openai"
assert config["browser"]["cloud_provider"] == "browser-use"
assert configured == []
# ── Platform / toolset consistency ────────────────────────────────────────────
class TestPlatformToolsetConsistency:
"""Every platform in tools_config.PLATFORMS must have a matching toolset."""
def test_all_platforms_have_toolset_definitions(self):
"""Each platform's default_toolset must exist in TOOLSETS."""
from hermes_cli.tools_config import PLATFORMS
from toolsets import TOOLSETS
for platform, meta in PLATFORMS.items():
ts_name = meta["default_toolset"]
assert ts_name in TOOLSETS, (
f"Platform {platform!r} references toolset {ts_name!r} "
f"which is not defined in toolsets.py"
)
def test_gateway_toolset_includes_all_messaging_platforms(self):
"""hermes-gateway includes list should cover all messaging platforms."""
from hermes_cli.tools_config import PLATFORMS
from toolsets import TOOLSETS
gateway_includes = set(TOOLSETS["hermes-gateway"]["includes"])
# Exclude non-messaging platforms from the check
non_messaging = {"cli", "api_server"}
for platform, meta in PLATFORMS.items():
if platform in non_messaging:
continue
ts_name = meta["default_toolset"]
assert ts_name in gateway_includes, (
f"Platform {platform!r} toolset {ts_name!r} missing from "
f"hermes-gateway includes"
)
def test_skills_config_covers_tools_config_platforms(self):
"""skills_config.PLATFORMS should have entries for all gateway platforms."""
from hermes_cli.tools_config import PLATFORMS as TOOLS_PLATFORMS
from hermes_cli.skills_config import PLATFORMS as SKILLS_PLATFORMS
non_messaging = {"api_server"}
for platform in TOOLS_PLATFORMS:
if platform in non_messaging:
continue
assert platform in SKILLS_PLATFORMS, (
f"Platform {platform!r} in tools_config but missing from "
f"skills_config PLATFORMS"
)