AI agents call xbrl_validate_extended 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.
Validation and checking tools typically analyze data for correctness without modifying or deleting it, making them Read operations. The empty description lowers confidence, but the naming pattern and position among non-destructive analysis tools (validation, comparison, fact extraction) suggests this performs checks rather than modifications.
From the tool's definition Tool name 'xbrl_validate_extended' contains 'validate' (checking/verification action); context suggests this is part of a financial filing validation suite alongside tools like 'xbrl_check_calculations' and 'xbrl_compare_filings'. No description provided.
Attacks that exploit this kind of access
xbrl_validate_extended. 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_validate_extended: 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_validate_extended 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_validate_extended 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_validate_extended. 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_validate_extended 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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