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 is covered. The description adds only that the key lives 'in the vault', but says nothing about irreversibility, permission requirements, or whether the key must exist beforehand — modest added value beyond 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?

A single tight sentence with the resource and target front-loaded. It earns its place but is so brief that economy shades into under-specification.

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?

An output schema exists, so return values need not be described. However, for a destructive mutation with two undocumented parameters and zero schema coverage, the description should say more about the scope parameter and the consequences of deletion.

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 0% for both parameters. The description explains neither the required 'provider' parameter's accepted values nor the 'scope' parameter, which defaults to 'entity' and is entirely unexplained anywhere — a meaningful gap the description fails to compensate for.

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+resource: 'Remove a stored BYOK provider key from the vault.' This clearly distinguishes it from the sibling read/set operations (list_llm_keys, set_llm_key, test_llm_key), though the description never names those alternatives explicitly.

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 indication of when to use this versus set_llm_key or test_llm_key, no prerequisites, and no warning that removal is irreversible. The reader must infer usage entirely from the tool name and the word 'Remove'.

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