Get a single bookmark by its ID with its group info and child count.
AI agents call get_bookmark to retrieve information from MCP Bookmarks without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves bookmark metadata (group info and child count) without side effects. It is a pure read operation analogous to a get or fetch. The blast radius of misuse is minimal — an AI agent could only retrieve existing bookmark data, not alter state, execute commands, or cause financial harm.
From the tool's definition Tool description states 'Get a single bookmark by its ID' — retrieval operation with no modification, deletion, or execution of external code.
Attacks that exploit this kind of access
Get a single bookmark by its ID with its group info and child count. It is categorised as a Read tool in the MCP Bookmarks MCP Server, which means it retrieves data without modifying state.
Register the MCP Bookmarks MCP server in PolicyLayer and add a rule for get_bookmark: 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 Bookmarks. Nothing to install.
get_bookmark 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 get_bookmark 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 get_bookmark. 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.
get_bookmark is provided by the MCP Bookmarks MCP server (linonon/mcpbookmarks). 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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