Download any Allen Institute file by its WellKnownFile ID (obtain via list_well_known_files or execute_rma_query on the WellKnownFile model). Covers transcriptomics CSV matrices, NWB files, SWC reconstructions, and any other bulk download.
AI agents call download_well_known_file to retrieve information from Allen Brain API 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 and downloads pre-existing data files from the Allen Institute API. It has no capability to create, modify, delete, or execute code. While downloads can transfer large volumes of data, the action itself is read-only with no destructive or reversible side effects on the server. Severity is low because misuse would result only in unauthorized data access, not infrastructure damage or data loss.
From the tool's definition Tool description states 'Download' and covers retrieval of existing files (transcriptomics CSV matrices, NWB files, SWC reconstructions). The term 'download' indicates data retrieval with no side effects or modifications.
Attacks that exploit this kind of access
Download any Allen Institute file by its WellKnownFile ID (obtain via list_well_known_files or execute_rma_query on the WellKnownFile model). Covers transcriptomics CSV matrices, NWB files, SWC reconstructions, and any other bulk download. It is categorised as a Read tool in the Allen Brain API MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Allen Brain API MCP Server MCP server in PolicyLayer and add a rule for download_well_known_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 Allen Brain API MCP Server. Nothing to install.
download_well_known_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 download_well_known_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 download_well_known_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.
download_well_known_file is provided by the Allen Brain API MCP Server MCP server (maflot/allenbrain-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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