AI agents call customfields.listCustomFieldContexts to retrieve information from Gojira without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries metadata about custom field configurations across projects. It retrieves organizational information without side effects, making it a Read operation. The severity is low because custom field context information is administrative metadata; exposure poses minimal risk even if an agent queries it extensively. The blast radius of misuse is limited to information disclosure of project structure.
From the tool's definition Tool name contains 'list' and description states 'List the contexts (project scopes) for a custom field' - a retrieval operation with no modification or destructive capability.
Attacks that exploit this kind of access
List the contexts (project scopes) for a custom field. It is categorised as a Read tool in the Gojira MCP Server, which means it retrieves data without modifying state.
Register the Gojira MCP server in PolicyLayer and add a rule for customfields.listCustomFieldContexts: 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 Gojira. Nothing to install.
customfields.listCustomFieldContexts 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 customfields.listCustomFieldContexts 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 customfields.listCustomFieldContexts. 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.
customfields.listCustomFieldContexts is provided by the Gojira MCP server (windoze95/gojira-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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