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

Annotations already mark the tool as destructive and idempotent; the description adds that it clears sensitive data saved earlier and that deletion is by key. This gives useful context about the intent and scope without contradicting the annotations.

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?

Three short sentences lead with the core action, then provide usage guidance and sibling context. No redundant text or 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?

For a simple one-parameter delete operation with destructive/idempotent annotations, the description covers purpose, usage, and context sufficiently. No output schema is expected for such an operation, so the absence of return-value details is not a gap.

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 input schema fully describes the only parameter ('Memory key to delete'), and the description reinforces the need for a key. Since schema coverage is 100%, the description doesn't need to add further parameter semantics, meeting the baseline.

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 uses the specific verb 'Delete' and identifies the resource as 'a previously stored memory by key', making the tool's function immediately clear. It also distinguishes itself from sibling memory tools by instructing to pair with 'remember and recall'.

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 provides explicit usage conditions ('when context is stale, the task is done, or you want to clear sensitive data'), which tells an agent when to invoke it. It does not formally state when not to use it or name an alternative for retrieval, but pairing with remember/recall offers some directional guidance.

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