Update an existing Firestore document
Part of the Firestore Server server.
Free to start. No card required.
AI agents use firestore-update-document to create or modify resources in Firestore Server. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call firestore-update-document repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Firestore Server.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"firestore-update-document": {
"limits": [
{
"counter": "firestore-update-document_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Firestore Server policy for all 23 tools.
These attack patterns abuse exactly the kind of access firestore-update-document gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Update an existing Firestore document. It is categorised as a Write tool in the Firestore Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Firestore Server MCP server in PolicyLayer and add a rule for firestore-update-document: 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 Firestore Server. Nothing to install.
firestore-update-document 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 firestore-update-document 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 firestore-update-document. 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.
firestore-update-document is provided by the Firestore Server MCP server (devlimelabs/firestore-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 23 Firestore Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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