fetch_health_summary
AI agents call fetch_health_summary to retrieve information from Senechal MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves health data without modifying or deleting it, placing it in the Read category. Severity is medium rather than low because the data accessed is personal health information, which is sensitive and could be misused if an agent exfiltrates or analyzes it without authorization. The empty tool description and reliance on naming conventions and server context reduce confidence slightly from high.
From the tool's definition Tool name 'fetch_health_summary' indicates data retrieval; server description states it 'provides health data' and enables 'access' to 'personal health information'; sibling tools include 'fetch_available_metrics' and 'fetch_health_profile' which are clearly…
Attacks that exploit this kind of access
fetch_health_summary. It is categorised as a Read tool in the Senechal MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Senechal MCP Server MCP server in PolicyLayer and add a rule for fetch_health_summary: 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 Senechal MCP Server. Nothing to install.
fetch_health_summary 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 fetch_health_summary 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 fetch_health_summary. 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.
fetch_health_summary is provided by the Senechal MCP Server MCP server (mattjoyce/senechal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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