Search for nonprofit organizations by name or keyword. Searches the ProPublica Nonprofit Explorer database of IRS 990 filers. Returns organization name, EIN, location, revenue, and tax status. Args: query: Search keywords (e.g. 'food bank', 'habitat for humanity'). state: Two-letter state abbrevi...
Risk signalsAccepts freeform code/query input (query)
Part of the IRS 990 Nonprofit Data server.
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AI agents call search_nonprofits to retrieve information from IRS 990 Nonprofit Data 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 search_nonprofits 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": {
"search_nonprofits": {}
}
}See the full IRS 990 Nonprofit Data policy for all 3 tools.
These attack patterns abuse exactly the kind of access search_nonprofits 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.
Search for nonprofit organizations by name or keyword. Searches the ProPublica Nonprofit Explorer database of IRS 990 filers. Returns organization name, EIN, location, revenue, and tax status. Args: query: Search keywords (e.g. 'food bank', 'habitat for humanity'). state: Two-letter state abbreviation to filter by (e.g. 'CA', 'TX'). ntee_code: NTEE major category code (1-10). 1=Arts, 2=Education, 3=Environment, 4=Health, 5=Human Services, 6=International, 7=Public Benefit, 8=Religion, 9=Mutual Benefit, 10=Unknown. c_code: IRS subsection code (e.g. 3 for 501(c)(3), 4 for 501(c)(4)). page: Zero-indexed page number (25 results per page).. It is categorised as a Read tool in the IRS 990 Nonprofit Data MCP Server, which means it retrieves data without modifying state.
Register the IRS 990 Nonprofit Data MCP server in PolicyLayer and add a rule for search_nonprofits: 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 IRS 990 Nonprofit Data. Nothing to install.
search_nonprofits 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 search_nonprofits 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 search_nonprofits. 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.
search_nonprofits is provided by the IRS 990 Nonprofit Data MCP server (https://mcp.olyport.com/irs-990/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 3 IRS 990 Nonprofit Data tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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