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

Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile and missing-key behavior are covered without the description. The description adds essentially nothing beyond restating the delete: it does not say whether deletion is recoverable, whether it is scoped per-agent, or what happens to related keys.

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?

One short, front-loaded sentence with no padding, so there is no waste to trim. However it is terse to the point of under-specification rather than being efficiently complete.

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 destructive, idempotent mutation with no output schema and a 2-param surface, the description should at minimum define what a 'key' is and which sibling operations share it. As written, an agent can guess the call shape but not the semantics of the key space being modified.

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% and the schema already documents api_key's auth alternatives, so the structured data carries the load. The description adds no meaning to 'key' — notably it never clarifies the key namespace shared with put_memory/get_memory, which is the one thing an agent actually needs.

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 verb+resource pair ('Delete a key') is clear and clearly distinct from get_memory/put_memory, but the resource is called a 'key from your home' while the tool name and title say 'memory' — an unexplained terminology mismatch that leaves the object of deletion ambiguous. Sibling tools like get_home/house_get make 'home' an actively misleading word choice here.

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?

No guidance on when to delete versus when to overwrite with put_memory, no prerequisites, no mention of companion tools (get_memory, put_memory) that operate on the same keys. The agent must infer the workflow entirely from the name.

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