Verify a cryptographic signature against a DID's public key.
AI agents call aip_verify_signature to retrieve information from Aip Identity without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Signature verification is a deterministic check that reads cryptographic material and returns a boolean result without creating, modifying, deleting, or executing anything. It belongs in the Read category.
From the tool's definition Tool performs cryptographic signature verification, comparing a signature against a public key—a pure validation operation with no side effects, data modification, or external state changes.
Attacks that exploit this kind of access
Verify a cryptographic signature against a DID's public key. It is categorised as a Read tool in the Aip Identity MCP Server, which means it retrieves data without modifying state.
Register the Aip Identity MCP server in PolicyLayer and add a rule for aip_verify_signature: 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 Aip Identity. Nothing to install.
aip_verify_signature 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 aip_verify_signature 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 aip_verify_signature. 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.
aip_verify_signature is provided by the Aip Identity MCP server (the-nexus-guard/aip-mcp-server). 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.
Teams ship this data inside their own products. See what a licence covers →