Get the next unprocessed inbox file and its content. Returns null when inbox is empty. Call this to start processing one file.
AI agents call knowledge_get_next_inbox_file 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.
This tool retrieves or queries data from an inbox without side effects. It is purely informational—reading the next file in a queue for processing. No data is modified, deleted, or executed. Classification as Read is appropriate with high confidence due to the clear retrieval semantics and absence of any mutative operations.
From the tool's definition Tool returns the next unprocessed inbox file and its content. The description explicitly states it retrieves data ('Get the next unprocessed inbox file') with no mention of modification, deletion, or execution.
Attacks that exploit this kind of access
Get the next unprocessed inbox file and its content. Returns null when inbox is empty. Call this to start processing one file. 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_get_next_inbox_file: 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_get_next_inbox_file 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_get_next_inbox_file 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_get_next_inbox_file. 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_get_next_inbox_file 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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