Look up valid code values for filter fields by searching free-text descriptions. Use the type parameter to select the lookup table: naics (NAICS industry codes), psc (product/service codes), cfda (CFDA/Assistance Listing program numbers), awarding_agency (agency names and IDs), or recipient (reci...
Part of the Usaspending Mcp Server server.
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AI agents call usaspending_autocomplete to retrieve information from Usaspending Mcp Server without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though usaspending_autocomplete only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"usaspending_autocomplete": {}
}
}See the full Usaspending Mcp Server policy for all 14 tools.
These attack patterns abuse exactly the kind of access usaspending_autocomplete gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Look up valid code values for filter fields by searching free-text descriptions. Use the type parameter to select the lookup table: naics (NAICS industry codes), psc (product/service codes), cfda (CFDA/Assistance Listing program numbers), awarding_agency (agency names and IDs), or recipient (recipient names and IDs). Call this before filtering awards when you know a description but not the exact code. Returns matching codes and names for use in other tool filters.. It is categorised as a Read tool in the Usaspending Mcp Server MCP Server, which means it retrieves data without modifying state.
Register the Usaspending Mcp Server MCP server in PolicyLayer and add a rule for usaspending_autocomplete: 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 Usaspending Mcp Server. Nothing to install.
usaspending_autocomplete 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 usaspending_autocomplete 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 usaspending_autocomplete. 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.
usaspending_autocomplete is provided by the Usaspending Mcp Server MCP server (@cyanheads/usaspending-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 14 Usaspending Mcp Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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