Delete one memory entry (requires explicit_user_intent)

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

The description adds idempotent behavior and the return value 'existed=false' for missing keys, which goes beyond the idempotentHint annotation. It does not contradict annotations. Could mention any side effects or return format for success, but the added value is good.

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 short sentences with no redundancy. Every word adds value: 'Delete a single key from memory', 'Idempotent', 'returns existed=false', 'Requires explicit_user_intent: true'. No filler.

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 the annotations (destructive, idempotent) and full schema coverage, the description is sufficiently complete for this tool. It mentions idempotency and return value. The only minor gap is not detailing the successful deletion response, but it's adequate.

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 the schema already documents both parameters thoroughly. The description adds no additional meaning for the parameters beyond what is in the schema, meeting the baseline of 3.

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 title and description clearly state 'Delete one memory entry' and 'Delete a single key from memory', which is a specific verb+resource. The title's parenthetical 'requires explicit_user_intent' distinguishes it from sibling tools like memory_forget_by_tag and memory_set.

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 does not explicitly state when to use this tool versus alternatives like memory_forget_by_tag or memory_set. The purpose is implied by the name and title, but no direct guidance is provided for choosing among siblings.

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