download_file_chunk
AI agents call download_file_chunk to retrieve information from MCP Document Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool downloads file chunks, which is a read operation that retrieves data without modification or side effects. The server is explicitly described as 'read-only' with 'path traversal protection', supporting this classification. Confidence is 0.85 rather than higher due to the empty description, though contextual evidence is strong.
From the tool's definition Tool name 'download_file_chunk' and context of a document server with 'read-only access' indicate retrieval of file data. The empty description and chunk-based approach suggest fetching portions of files, consistent with read operations.
Attacks that exploit this kind of access
download_file_chunk. It is categorised as a Read tool in the MCP Document Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Document Server MCP server in PolicyLayer and add a rule for download_file_chunk: 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 MCP Document Server. Nothing to install.
download_file_chunk 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 download_file_chunk 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 download_file_chunk. 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.
download_file_chunk is provided by the MCP Document Server MCP server (watsona4/mcp-document-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.
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