Add a BYOK API key

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

The description adds transparency by stating that the key is stored encrypted in Supabase Vault, which goes beyond the annotations. It doesn't disclose potential side effects or permissions, but with openWorldHint=true, it provides good additional context.

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?

The description is two sentences (54 words), no fluff, effectively conveying the essential information.

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?

The description covers the main purpose, parameter usage, and a security detail. It lacks information about return value or success indication, but given simplicity and no output schema, it is fairly complete.

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%, so baseline is 3. The description reinforces the purpose of label and priority but adds only marginal value beyond the schema descriptions.

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 verb 'add' and the resource 'API key to the project's BYOK pool'. It lists the specific providers and mentions label and priority for ordering, distinguishing it from sibling tools like 'list_byok_keys'.

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 provides clear context for when to use the tool (adding a key to BYOK pool for specified providers) but does not explicitly state when not to use it or contrast with alternatives.

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