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

Annotations already declare readOnlyHint, idempotentHint, non-destructive, and closed-world, fully covering the safety profile. The description adds nothing beyond that (no pagination, no empty-case behavior), but with full annotation coverage a 3 is appropriate.

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?

One tight sentence with the key clarification (which memory and where to get the slug) front-loaded. Zero waste.

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 1-param read-only list with an output schema present, the description covers the essential input origin. It lacks disambiguation from sibling list tools, which is the main remaining gap given the tool's low complexity.

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 description coverage is 0%, and the single 'memory' param has no description in the schema. The description partially compensates by explaining it's a slug obtained from list_my_memories, which adds real meaning. But it stops short of format or validation details.

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?

States a clear verb+resource (list classes in a memory). The parenthetical '(schema)' adds a useful gloss. However, it doesn't distinguish itself from the many sibling list_* tools (list_class_objects, list_objects, list_my_memories).

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?

It hints at the upstream step by referencing 'slug from list_my_memories', which implies a workflow. But it offers no when-not guidance or alternatives (e.g., list_class_objects vs list_classes), leaving selection among sibling list tools to inference.

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