AI agents call project_get_custom_field_values to retrieve information from Testops without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs a query operation to retrieve custom field values with pagination support. The use of 'Get' and the return structure (items, total, page, size) indicate a read-only data retrieval function. No data is created, modified, deleted, or executed. This is consistent with sibling tools like launch_get, project_get_by_id which are clearly retrieval operations.
From the tool's definition Tool description states 'Get available values for a custom field with pagination. Returns { items, total, page, size }' - this is a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
Get available values for a custom field with pagination. Returns { items, total, page, size } so the model can fetch in chunks. It is categorised as a Read tool in the Testops MCP Server, which means it retrieves data without modifying state.
Register the Testops MCP server in PolicyLayer and add a rule for project_get_custom_field_values: 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 Testops. Nothing to install.
project_get_custom_field_values 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 project_get_custom_field_values 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 project_get_custom_field_values. 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.
project_get_custom_field_values is provided by the Testops MCP server (@syn7xx/testops-mcp-server). 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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