AI agents use raster_reproject to create or update resources in Gdal — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Gdal environment.
Raster reprojection is a reversible write operation—it transforms data but does not delete or destroy the original. It does not execute arbitrary code or move money. Severity is high because incorrect reprojection parameters could corrupt geospatial analysis pipelines downstream, and an AI agent without proper justification (as noted in the server's reflection middleware) could misapply coordinate systems causing…
From the tool's definition Tool name 'raster_reproject' indicates a reprojection operation on raster data. Reprojection transforms geospatial data from one coordinate system to another, which modifies the raster object's metadata and potentially its pixel values (via resampling).
Documented attack patterns abuse exactly the kind of access raster_reproject gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Gdal, and nothing reaches the server without passing your rules. This is the rule we recommend for raster_reproject:
{
"version": "1",
"default": "deny",
"tools": {
"raster_reproject": {
"limits": [
{
"counter": "raster_reproject_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}raster_reproject stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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raster_reproject. It is categorised as a Write tool in the Gdal MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Gdal MCP server in PolicyLayer and add a rule for raster_reproject: 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 Gdal. Nothing to install.
raster_reproject is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the raster_reproject 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 raster_reproject. 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.
raster_reproject is provided by the Gdal MCP server (jordangunn/gdal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 13 Gdal tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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13 Gdal tools catalogued and risk-classified — across an index of 42,500+ MCP servers.