AI agents use create-spatial-index to create or update resources in PostGIS MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your PostGIS MCP Server environment.
Creating a spatial index modifies the database schema by adding an index structure. This is a Write operation as it creates a new database object. Severity is medium because while it modifies the database structure, it is reversible (the index can be dropped) and does not delete data or cause financial impact.
From the tool's definition Tool name 'create-spatial-index' and description 'Mekansal indeks oluştur' (Turkish for 'Create spatial index') indicate creation of a database index structure.
Documented attack patterns abuse exactly the kind of access create-spatial-index gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and PostGIS MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for create-spatial-index:
{
"version": "1",
"default": "deny",
"tools": {
"create-spatial-index": {
"limits": [
{
"counter": "create-spatial-index_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create-spatial-index 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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Mekansal indeks oluştur. It is categorised as a Write tool in the PostGIS MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the PostGIS MCP Server MCP server in PolicyLayer and add a rule for create-spatial-index: 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 PostGIS MCP Server. Nothing to install.
create-spatial-index 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 create-spatial-index 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 create-spatial-index. 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.
create-spatial-index is provided by the PostGIS MCP Server MCP server (receptopalak/postgis-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from PostGIS MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
25 PostGIS MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.