AI agents call xbrl_edgar_filing_index to retrieve information from Arelle without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Although the tool description is empty, the name strongly suggests indexing or searching SEC EDGAR filing records—a read-only operation with no side effects. There is no indication of data modification, deletion, execution of arbitrary code, or financial transactions. The typical use case for an 'index' tool in this financial analysis context is to retrieve or query filing metadata and information.
From the tool's definition Tool name 'xbrl_edgar_filing_index' contains 'index' which implies retrieval/querying of filing index data from SEC EDGAR.
Attacks that exploit this kind of access
xbrl_edgar_filing_index. It is categorised as a Read tool in the Arelle MCP Server, which means it retrieves data without modifying state.
Register the Arelle MCP server in PolicyLayer and add a rule for xbrl_edgar_filing_index: 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 Arelle. Nothing to install.
xbrl_edgar_filing_index 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 xbrl_edgar_filing_index 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 xbrl_edgar_filing_index. 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.
xbrl_edgar_filing_index is provided by the Arelle MCP server (thekinghippopotamus/arelle-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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