list_collections
AI agents call list_collections to retrieve information from Outline MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Listing collections retrieves information about existing document groupings with no capability to modify, delete, or execute operations. This is a straightforward Read operation with minimal blast radius if misused—an AI agent can only discover what collections exist, not alter them or access sensitive data beyond visibility.
From the tool's definition Tool name 'list_collections' indicates retrieval of collection metadata without modification. The server description emphasizes 'document search, reading, and management', and this tool fits the read pattern (list, get, fetch).
Attacks that exploit this kind of access
list_collections. It is categorised as a Read tool in the Outline MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Outline MCP Server MCP server in PolicyLayer and add a rule for list_collections: 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 Outline MCP Server. Nothing to install.
list_collections 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 list_collections 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 list_collections. 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.
list_collections is provided by the Outline MCP Server MCP server (mcp-outline). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
list_collections is one line of Outline MCP Server's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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