List instances with cached server memory, optionally showing only those with stale modules to manage TTL expiration.
List all instances that have cached server memory. Set stale_only=true to show only instances with at least one module whose data has exceeded its TTL.
| Name | Required | Description | Default |
|---|---|---|---|
| stale_only | No | When true, return only entries with stale modules. |
Changes observed during successful MCP inspections.
v2.24.0v2.23.8v1.0.0Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description must inform about behavior. It only states the basic action and the stale_only filter, omitting details like authorization, rate limits, pagination, or output format.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is two sentences, each earning its place. The main purpose is front-loaded, and the filtering option is explained concisely.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple list tool with one optional boolean parameter and no output schema, the description adequately explains functionality. It could be improved by mentioning return format or likely fields, but it is mostly complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% for the single boolean parameter. The description adds clarification on what 'stale' means (exceeded TTL), but the schema description already covers the parameter's purpose. Baseline 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool lists all instances with cached server memory, and optionally filters for stale ones. It is a specific verb+resource combination and distinguishes from sibling tools like get_server_memory.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implicitly says when to use (to list cached instances, optionally with stale_only), but provides no guidance on when not to use or alternatives among the many sibling tools.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.