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

Annotations already declare readOnly, idempotent, and non-destructive, so the safety profile is covered by structured data. The description adds the ordering guarantee ('newest first') and a result cap ('max 50'), which is genuine behavioral context, but it says nothing about pagination, whether the cap truncates silently, or what an empty result means.

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?

Two sentences, front-loaded with the primary action and then the two parameter behaviors. No filler, nothing repeated from the schema, and every clause carries information an agent needs.

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 read-only list tool with two optional parameters and no output schema, the description covers ordering, filtering, and the limit cap. The remaining gaps (default limit value, pagination behavior, what a memory record contains) are minor and partly inferable, but not all are addressed.

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%, so the description must carry the burden, and it does: it explains that limit caps results and adds the non-obvious maximum of 50, and that project scopes to a single project. It omits the default limit of 15 and the empty-string default for project, so it doesn't fully compensate.

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 specific verb and resource ('Lists the user's most recently saved memories') plus the ordering scope ('newest first'). It doesn't name or position itself against siblings like memory_search or memory_timeline, so an agent must infer the distinction, but the purpose itself is unambiguous.

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 phrase 'optionally for one project' implies the filtering use case, but there is no explicit when-to-use guidance, no statement of when memory_search or memory_timeline would be preferable, and no exclusion criteria. Usage is implied rather than stated.

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