Full-text search over uncompiled inbox files in a workspace. Use this before compiling to check if an inbox file overlaps with existing inbox content.
AI agents call knowledge_search_inbox to retrieve information from Chisel Knowledge MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool only queries and retrieves data from inbox files without any side effects, modification capabilities, or external execution. Full-text search is a classic Read operation that poses minimal security risk even if misused by an AI agent, as it cannot alter state or trigger external actions.
From the tool's definition Tool performs 'full-text search over uncompiled inbox files' with no capability to modify, delete, or execute operations. The description explicitly describes a search operation ('search'), which is a read-only retrieval action.
Attacks that exploit this kind of access
Full-text search over uncompiled inbox files in a workspace. Use this before compiling to check if an inbox file overlaps with existing inbox content. It is categorised as a Read tool in the Chisel Knowledge MCP MCP Server, which means it retrieves data without modifying state.
Register the Chisel Knowledge MCP server in PolicyLayer and add a rule for knowledge_search_inbox: 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 Chisel Knowledge MCP. Nothing to install.
knowledge_search_inbox 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 knowledge_search_inbox 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 knowledge_search_inbox. 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.
knowledge_search_inbox is provided by the Chisel Knowledge MCP server (teknologika/chisel-knowledge-mcp). 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.
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