Search citation-ready evidence spans with exact locator metadata.
AI agents call find_evidence_spans to retrieve information from Asset Aware without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a search operation to locate and retrieve evidence spans from documents for citation purposes. The use of 'search' and 'find' verbs, combined with the read-only nature of retrieving metadata and locator information, clearly places it in the Read category. There is no creation, modification, deletion, or execution of code—only data retrieval.
From the tool's definition Tool name 'find_evidence_spans' and description 'Search citation-ready evidence spans with exact locator metadata' indicate retrieval and querying of data with no modification or side effects.
Attacks that exploit this kind of access
Search citation-ready evidence spans with exact locator metadata. It is categorised as a Read tool in the Asset Aware MCP Server, which means it retrieves data without modifying state.
Register the Asset Aware MCP server in PolicyLayer and add a rule for find_evidence_spans: 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 Asset Aware. Nothing to install.
find_evidence_spans 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 find_evidence_spans 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 find_evidence_spans. 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.
find_evidence_spans is provided by the Asset Aware MCP server (u9401066/asset-aware-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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