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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds useful scope semantics ('since a timestamp (usually the run's start)') and return content, but says nothing about pagination, ordering, or result size limits for what could be an unbounded list.

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?

A single front-loaded sentence that states what is listed, the filter, and the returned fields without filler. It is slightly dense with three parenthetical clauses, but every clause earns its place.

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?

With no output schema, the description does name the key returned fields (confidence, depth), which partially compensates. Combined with annotations covering safety and a fully documented two-parameter schema, an agent has enough to invoke it correctly; only pagination/ordering behavior is missing.

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%, so both parameters are already documented in the schema. The description restates the 'since' meaning ('usually the run's start') which the schema already conveys ('usually the run's startedAt'), adding no new syntax or format detail. 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?

States a specific verb and resource ('Lists every memory created or updated since a timestamp') plus the returned fields (confidence and depth) and the intended review workflow. It is clear and self-contained, but it never names or contrasts itself with the obvious sibling memory_list/memory_search, so an agent must infer the distinction.

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 trailing clause 'so the user can review and correct what was written' implies the usage context (post-run review of what a run wrote), but there is no explicit when-to-use, when-not-to-use, or named alternative. The agent is left to infer that this is the run-scoped counterpart to memory_list.

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