nominatim-search
Forward-geocode a free-text query against OpenStreetMap Nominatim.
This record as markdown: /tools/io-github-derekslinz-meta-data-mcp/nominatim-search.md
What nominatim-search does on Meta Data Mcp
AI agents call nominatim-search to retrieve information from Meta Data Mcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why nominatim-search is rated Low
This tool retrieves geographic location data from OpenStreetMap Nominatim in response to a search query. It has no side effects, cannot modify or delete data, and does not execute code or trigger external operations beyond a simple API lookup. It clearly falls under the 'Read' category as a data retrieval operation.
From the tool's definition Tool description: 'Forward-geocode a free-text query against OpenStreetMap Nominatim.' The action is querying/searching geographic data with no modification, deletion, or execution of arbitrary code. Nominatim is a read-only geocoding API.
Attacks that exploit this kind of access
The rule that runs nominatim-search safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Meta Data Mcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For nominatim-search, this is the rule to start with:
nominatim-search is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Meta Data Mcp, apply this rule, and every nominatim-search call is checked against it from then on.
Questions about nominatim-search
Forward-geocode a free-text query against OpenStreetMap Nominatim. It is categorised as a Read tool in the Meta Data Mcp MCP Server, which means it retrieves data without modifying state.
Register the Meta Data MCP server in PolicyLayer and add a rule for nominatim-search: 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 Meta Data Mcp. Nothing to install.
nominatim-search 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 nominatim-search 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 nominatim-search. 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.
nominatim-search is provided by the Meta Data MCP server (pypi:meta-data-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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