Get custom fields for a project
AI agents call youtrack_get_project_custom_fields to retrieve information from YouTrack MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves custom field definitions associated with a project. It performs a read-only operation that retrieves metadata/configuration information. There is no data creation, modification, deletion, or execution of external operations. The blast radius of misuse is minimal — an attacker could enumerate project configuration details but cannot modify or delete data.
From the tool's definition Tool name contains 'get' and description states 'Get custom fields for a project' — retrieves configuration data without modification or side effects.
Attacks that exploit this kind of access
Get custom fields for a project. It is categorised as a Read tool in the YouTrack MCP Server MCP Server, which means it retrieves data without modifying state.
Register the YouTrack MCP Server MCP server in PolicyLayer and add a rule for youtrack_get_project_custom_fields: 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 YouTrack MCP Server. Nothing to install.
youtrack_get_project_custom_fields 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 youtrack_get_project_custom_fields 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 youtrack_get_project_custom_fields. 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.
youtrack_get_project_custom_fields is provided by the YouTrack MCP Server MCP server (lucyfuur94/youtrack-integration). 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.
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