Query data from a collection. Supports URL-style, regex, and MongoDB-style JSON queries with comparison operators. Can also query system collections like
AI agents call query_collection to retrieve information from Codehooks Io 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 or queries data without side effects. While it supports powerful query operators (regex, MongoDB-style), it is fundamentally a read operation. Severity is medium rather than low because regex queries and system collection access could potentially expose sensitive data or allow information disclosure if misused by an agent, but the tool itself cannot modify or delete data.
From the tool's definition Tool name is 'query_collection' and description states 'Query data from a collection' with support for URL-style, regex, and MongoDB-style JSON queries. No modification, deletion, or execution of code is mentioned.
Documented attack patterns abuse exactly the kind of access query_collection gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Codehooks Io MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for query_collection:
{
"version": "1",
"default": "deny",
"tools": {
"query_collection": {}
}
}query_collection is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Query data from a collection. Supports URL-style, regex, and MongoDB-style JSON queries with comparison operators. Can also query system collections like. It is categorised as a Read tool in the Codehooks Io MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Codehooks Io MCP Server MCP server in PolicyLayer and add a rule for query_collection: 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 Codehooks Io MCP Server. Nothing to install.
query_collection 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 query_collection 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 query_collection. 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.
query_collection is provided by the Codehooks Io MCP Server MCP server (restdb/codehooks-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Codehooks Io 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.
20 Codehooks Io MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.