Compute SHA3-256 fingerprint of a public key. Returns lowercase hex.
AI agents call pqc_fingerprint to retrieve information from Post-Quantum Cryptography 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 a computed cryptographic hash value from a public key input. Hashing is a read-only operation with no side effects—it does not modify data, execute arbitrary code, delete anything, or commit financial resources. The output is deterministic and non-reversible by design, but that property does not elevate it beyond Read category.
From the tool's definition Tool computes and returns a SHA3-256 fingerprint (hash digest) of a public key in hex format. No modification, deletion, execution of external code, or financial operations occur.
Attacks that exploit this kind of access
Compute SHA3-256 fingerprint of a public key. Returns lowercase hex. It is categorised as a Read tool in the Post-Quantum Cryptography MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Post-Quantum Cryptography MCP Server MCP server in PolicyLayer and add a rule for pqc_fingerprint: 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 Post-Quantum Cryptography MCP Server. Nothing to install.
pqc_fingerprint 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 pqc_fingerprint 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 pqc_fingerprint. 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.
pqc_fingerprint is provided by the Post-Quantum Cryptography MCP Server MCP server (scottdhughes/post-quantum-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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