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List API Keys

list-api-keys

Retrieve a list of all Resend API keys, including their names, IDs, and creation dates. Supports pagination using limit, after, and before parameters.

Instructions

List all API keys from Resend. Returns API key names, IDs, and creation dates. Don't bother telling the user the IDs or creation dates unless they ask for them.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
afterNoAPI key ID after which to retrieve more (for forward pagination). Cannot be used with "before".
limitNoNumber of API keys to retrieve. Max: 100, Min: 1
beforeNoAPI key ID before which to retrieve more (for backward pagination). Cannot be used with "after".
Behavior2/5

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

With no annotations provided, the description must disclose behavioral traits. It mentions returning specific fields but does not disclose pagination behavior or that 'list all' may not return all keys due to limit/before/after parameters. No authentication or rate limit info.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise (two sentences) and front-loaded with the core purpose. The second sentence is a directive that adds value but could be integrated more naturally. No unnecessary words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given no output schema, the description partially explains return values (names, IDs, dates) but omits details on pagination response structure or error handling. For a simple list tool, it is adequate but not fully complete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% with each parameter described. The description adds no additional meaning beyond the schema, so baseline 3 is appropriate. It does not elaborate on pagination or parameter interactions.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool lists API keys and specifies the returned fields (names, IDs, creation dates). However, saying 'list all' conflicts with the pagination parameters, which could be misleading. It distinguishes from sibling list tools by the resource type.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description includes a usage hint for the agent (not to mention IDs/dates unless asked), but does not provide explicit guidance on when to use this tool versus alternatives like search or filter. It lacks when-not-to-use or alternative tool mentions.

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

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