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

Annotations already declare destructiveHint=true and idempotentHint=true, so the description does not need to restate those. It adds valuable context by clarifying what gets destroyed ('previously stored memory' and 'sensitive data'), which goes beyond the structured annotations. No contradictions found.

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, no filler. The first sentence front-loads the action, the second provides usage context and alternatives. Every word 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?

For a simple deletion tool with one parameter and no output schema, the description is complete: it states what it does, when to use it, and related tools. The idempotentHint annotation covers the missing-key edge case, so no additional operational details are needed.

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 100% for the single 'key' parameter, so the schema already fully explains it as 'Memory key to delete.' The tool description adds no additional parameter detail beyond the word 'key', thus falls at the baseline for high schema coverage.

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 clearly states the tool's action: 'Delete a previously stored memory by key.' It uses a specific verb ('Delete') and resource ('memory by key'), and distinguishes itself from sibling tools like 'remember' and 'recall' by its management role.

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 scenarios: 'Use when context is stale, the task is done, or you want to clear sensitive data the agent saved earlier.' It also directly references alternatives with 'Pair with remember and recall,' giving clear guidance on when to use this tool versus siblings.

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