Check secret metadata via HEAD without consuming a read.
AI agents call inspect_secret to retrieve information from Sirr 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 only metadata about secrets (headers/metadata) without accessing the actual secret values. It performs a non-destructive inspection using HTTP HEAD semantics, which is a read operation with minimal side effects.
From the tool's definition Tool description states 'Check secret metadata via HEAD without consuming a read' and 'metadata-only' operations are explicitly mentioned in server description as a security feature.
Attacks that exploit this kind of access
Check secret metadata via HEAD without consuming a read. It is categorised as a Read tool in the Sirr MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Sirr MCP Server MCP server in PolicyLayer and add a rule for inspect_secret: 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 Sirr MCP Server. Nothing to install.
inspect_secret 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 inspect_secret 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 inspect_secret. 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.
inspect_secret is provided by the Sirr MCP Server MCP server (sirrlock/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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