AI agents call scf_list_evidence_catalog to retrieve information from Scf without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries data from a reference catalog of standard evidence types. It is purely informational and supports search/listing, which are canonical Read operations. No data is modified, deleted, executed, or committed financially. The low severity reflects that listing compliance evidence types poses minimal risk even if misused by an AI agent.
From the tool's definition Tool performs 'List evidence items' and supports 'free-text search and pagination' — core read operations with no creation, modification, deletion, or execution. Returns reference catalog data without side effects.
Attacks that exploit this kind of access
List evidence items from the SCF reference catalog — the 272 standard evidence types that can be collected to demonstrate control implementation. Supports free-text search and pagination. It is categorised as a Read tool in the Scf MCP Server, which means it retrieves data without modifying state.
Register the Scf MCP server in PolicyLayer and add a rule for scf_list_evidence_catalog: 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 Scf. Nothing to install.
scf_list_evidence_catalog 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 scf_list_evidence_catalog 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 scf_list_evidence_catalog. 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.
scf_list_evidence_catalog is provided by the Scf MCP server (mcp-server-scf). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
scf_list_evidence_catalog is one line of Scf's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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