"What are the coordinates of [address]" / "geocode [place]" / "lat lng for [location]" / "find [city] on a map" — convert a street address, city, or place name to GPS coordinates (longitude / latitude) using Mapbox's global geocoder. Works on any street, intersection, POI, or administrative area ...
Risk signalsAccepts freeform code/query input (query) · Admin/system-level operation
Part of the Mapbox server.
Free to start. No card required.
AI agents call geocode_forward to retrieve information from Mapbox 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 geocode_forward 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": {
"geocode_forward": {}
}
}See the full Mapbox policy for all 28 tools.
These attack patterns abuse exactly the kind of access geocode_forward 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.
"What are the coordinates of [address]" / "geocode [place]" / "lat lng for [location]" / "find [city] on a map" — convert a street address, city, or place name to GPS coordinates (longitude / latitude) using Mapbox's global geocoder. Works on any street, intersection, POI, or administrative area worldwide. Example: geocode_forward({ query: "1600 Pennsylvania Ave, Washington DC" }).. It is categorised as a Read tool in the Mapbox MCP Server, which means it retrieves data without modifying state.
Register the Mapbox MCP server in PolicyLayer and add a rule for geocode_forward: 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 Mapbox. Nothing to install.
geocode_forward 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 geocode_forward 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 geocode_forward. 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.
geocode_forward is provided by the Mapbox MCP server (https://gateway.pipeworx.io/mapbox/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 28 Mapbox tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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