Low Risk

get_evidence

Fetch the evidence register entries for a scenario — the citations, sources, and supporting documents the analyst attached to back the assumptions. Use this when an analysis question references 'what's the evidence for X?'

Part of the Phasefolio MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.

AI agents call get_evidence to retrieve information from Phasefolio without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.

Even though get_evidence only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.

Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.

com-phasefolio-phasefolio.yaml
tools:
  get_evidence:
    rules:
      - action: allow

See the full Phasefolio policy for all 9 tools.

Tool Name get_evidence
Category Read
Risk Level Low

View all 9 tools →

Agents calling read-class tools like get_evidence have been implicated in these attack patterns. Read the full case and prevention policy for each:

Browse the full MCP Attack Database →

Other tools in the Read risk category across the catalogue. The same policy patterns (rate-limit, allow) apply to each.

What does the get_evidence tool do? +

Fetch the evidence register entries for a scenario — the citations, sources, and supporting documents the analyst attached to back the assumptions. Use this when an analysis question references 'what's the evidence for X?'. It is categorised as a Read tool in the Phasefolio MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_evidence? +

Add a rule in your Intercept YAML policy under the tools section for get_evidence. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Phasefolio MCP server.

What risk level is get_evidence? +

get_evidence is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_evidence? +

Yes. Add a rate_limit block to the get_evidence rule in your Intercept 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.

How do I block get_evidence completely? +

Set action: deny in the Intercept policy for get_evidence. 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.

What MCP server provides get_evidence? +

get_evidence is provided by the Phasefolio MCP server (@phasefolio/mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Let agents act without letting them run wild.

Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.

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