Get statistics for a collection.
AI agents call collection_stats to retrieve information from ChromaDB MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves aggregated statistical information about a collection (e.g., document count, storage size, metadata summaries) without querying, modifying, or deleting any underlying data. It is a pure read operation with minimal security impact.
From the tool's definition Tool name is 'collection_stats' and description states 'Get statistics for a collection.' The verb 'get' indicates data retrieval with no modification or side effects.
Attacks that exploit this kind of access
Get statistics for a collection. It is categorised as a Read tool in the ChromaDB MCP Server MCP Server, which means it retrieves data without modifying state.
Register the ChromaDB MCP Server MCP server in PolicyLayer and add a rule for collection_stats: 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 ChromaDB MCP Server. Nothing to install.
collection_stats 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 collection_stats 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 collection_stats. 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.
collection_stats is provided by the ChromaDB MCP Server MCP server (rkilchmn/chroma-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →