Fetches the allowed values for a specific field, such as a list of categories or tags. Useful for finding valid inputs for content fields. Example: plone_get_vocabularies({vocabulary:
AI agents call plone_get_vocabularies to retrieve information from Plone MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a pure read operation that queries and returns metadata about allowed field values. It has no write, delete, execute, or financial impact. The low severity reflects minimal blast radius—returning vocabulary data cannot harm the system or user data regardless of how an AI agent uses it.
From the tool's definition Tool name 'plone_get_vocabularies' and description 'Fetches the allowed values for a specific field' indicate a retrieval operation with no side effects. It retrieves reference data (valid field values, categories, tags) without modifying or deleting content.
Attacks that exploit this kind of access
Fetches the allowed values for a specific field, such as a list of categories or tags. Useful for finding valid inputs for content fields. Example: plone_get_vocabularies({vocabulary:. It is categorised as a Read tool in the Plone MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Plone MCP Server MCP server in PolicyLayer and add a rule for plone_get_vocabularies: 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 Plone MCP Server. Nothing to install.
plone_get_vocabularies 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 plone_get_vocabularies 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 plone_get_vocabularies. 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.
plone_get_vocabularies is provided by the Plone MCP Server MCP server (plone/plone-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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