tengu_copilot_signal_health
CONTRACT C2 — is the alpha signal fit to trade, and do we actually know? CALL THIS BEFORE acting on /top-picks or /score. Returns a closed-vocabulary status (healthy | degraded | do_not_trade | unknown), a tradeable boolean to branch on, decile_convention (10_is_best), the per-horizon live IC, an...
This record as markdown: /tools/tengu-mcp/tengu-copilot-signal-health.md
What tengu_copilot_signal_health does on Tengu
AI agents call tengu_copilot_signal_health to retrieve information from Tengu without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why tengu_copilot_signal_health is rated Low
Even though tengu_copilot_signal_health only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
The rule that runs tengu_copilot_signal_health safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Tengu, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For tengu_copilot_signal_health, this is the rule to start with:
tengu_copilot_signal_health is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Tengu, apply this rule, and every tengu_copilot_signal_health call is checked against it from then on.
Questions about tengu_copilot_signal_health
CONTRACT C2 — is the alpha signal fit to trade, and do we actually know? CALL THIS BEFORE acting on /top-picks or /score. Returns a closed-vocabulary status (healthy | degraded | do_not_trade | unknown), a tradeable boolean to branch on, decile_convention (10_is_best), the per-horizon live IC, and prose guidance. Fail CLOSED on anything other than healthy — treat it as an empty candidate list. unknown is a real verdict, not a placeholder: it means no BELIEVABLE current measurement exists, which carries the same instruction as red. The contract checks whether the measurement is trustworthy, not merely recent — a drift job that re-stamps a frozen input publishes today's date over old numbers, and this refuses to grade that as fresh. It is categorised as a Read tool in the Tengu MCP Server, which means it retrieves data without modifying state.
Register the Tengu MCP server in PolicyLayer and add a rule for tengu_copilot_signal_health: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Tengu. Nothing to install.
tengu_copilot_signal_health is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the tengu_copilot_signal_health rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for tengu_copilot_signal_health. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
tengu_copilot_signal_health is provided by the Tengu MCP server (Hlobo-dev/tengu-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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