Catalog and memory overview

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

The readOnlyHint annotation already establishes that this is a safe read operation, and the description does not contradict it. The description adds useful transparency by stating exactly which state areas are covered: catalog counts by kind and layer, knowledge index size, stored preferences, and parse failures. This helps set expectations beyond the bare annotation.

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 a single, front-loaded sentence that lists exactly what will be reported. Every element earns its place and there is no filler, making it easy for an agent to parse quickly.

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?

Given that there is no output schema and no parameters, the description does the necessary work by enumerating the main categories of returned information. It is sufficiently complete for a read-only status/overview tool, though additional detail about the exact shape of counts or failure entries could make it even more precise.

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?

The tool takes zero parameters, so parameter semantics are not a burden for the description. The baseline of 4 applies because there is no parameter schema detail missing and no parameter-level explanation needed.

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 conveys that this tool reports the current state of what is loaded, including catalog counts, knowledge index size, stored preferences, and parse failures. It is specific about the resource and content, and the title reinforces that it is an overview. It does not use an explicit verb like 'returns' or 'shows', but the intent is unmistakable and distinguishable from sibling list/search tools.

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 implies when to use the tool: whenever an agent needs a high-level summary of loaded catalog and memory state. However, it gives no explicit when-to-use or when-not-to-use guidance, nor does it contrast itself with siblings such as list_catalog or search_knowledge, so the agent must infer the best choice.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.