AI agents call scf_list_evidence_files 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 lists metadata about evidence files (filenames, timestamps, validation status) and provides download URLs. It performs no creation, modification, deletion, code execution, or financial operations. The 'pre-signed download URL' is a read credential, not a destructive or write operation. The 15-minute expiry on the URL is a standard security control for read access.
From the tool's definition Tool name: 'scf_list_evidence_files' — 'List all files' indicates retrieval without modification. Description states it 'Returns filename, content type, upload timestamp, validation status, and a pre-signed download URL' — purely informational queries with no…
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
List all files uploaded or ingested for an evidence item. Returns filename, content type, upload timestamp, validation status, and a pre-signed download URL (15-min expiry). 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_files: 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_files 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_files 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_files. 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_files 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.
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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