AI agents call get_audit_ledger to retrieve information from Todos without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
get_audit_ledger reads and processes existing audit evidence to generate a hash chain for verification purposes. It has no side effects on the underlying task data, does not execute arbitrary code, and does not modify or delete records. This is purely a Read operation that queries and organizes existing data into an audit format.
From the tool's definition The tool description indicates it 'Build[s] a tamper-evident local audit hash chain from task, run, verification, approval, and handoff evidence.' This is a retrieval and computation operation over existing evidence data to construct an audit ledger—no…
Attacks that exploit this kind of access
Build a tamper-evident local audit hash chain from task, run, verification, approval, and handoff evidence. It is categorised as a Read tool in the Todos MCP Server, which means it retrieves data without modifying state.
Register the Todos MCP server in PolicyLayer and add a rule for get_audit_ledger: 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 Todos. Nothing to install.
get_audit_ledger 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 get_audit_ledger 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 get_audit_ledger. 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.
get_audit_ledger is provided by the Todos MCP server (@hasna/todos). 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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