nominatim_search
Geocode a place name or address to coordinates using OpenStreetMap Nominatim.
This record as markdown: /tools/io-github-malamutemayhem-unclick-mcp-server/nominatim-search.md
What nominatim_search does on UnClick
AI agents call nominatim_search to retrieve information from UnClick without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
limit | number | — | Max results (default 5, max 20). |
query | string | Yes | Place name or address to search. |
Parameters from the server's own tool schema.
Why nominatim_search is rated Low
This tool queries a public geocoding service and returns coordinate data. It has no side effects on any system, does not modify data, and does not execute arbitrary code or commands. It falls squarely into the Read category with low severity since public coordinate data is not sensitive and cannot be misused to compromise systems or cause harm.
From the tool's definition Tool description states it 'Geocode a place name or address to coordinates' — a pure data retrieval operation using OpenStreetMap's Nominatim API. No modification, deletion, or code execution is performed.
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 UnClick, 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 UnClick, apply this rule, and every nominatim_search call is checked against it from then on.
Questions about nominatim_search
Geocode a place name or address to coordinates using OpenStreetMap Nominatim. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
nominatim_search accepts 2 parameters: limit, query. Required: query. The full parameter table on this page comes from the server's own tool schema.
Register the UnClick 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 UnClick. 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 UnClick MCP server (@unclick/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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