Read a secret value by hash. Consumes a read. Returns null if burned/expired.
AI agents call read_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 performs a read-only operation that retrieves data (secret values) without modification or deletion. It matches the Read category definition: 'retrieves or queries data; no side effects.' The severity is elevated to 'high' rather than 'low' because the data being read are secrets—sensitive credentials or information. Misuse could lead to unauthorized disclosure of sensitive data.
From the tool's definition Tool description states "Read a secret value by hash" and "Consumes a read." The name and description clearly indicate a retrieval operation.
Attacks that exploit this kind of access
Read a secret value by hash. Consumes a read. Returns null if burned/expired. 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 read_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.
read_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 read_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 read_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.
read_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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