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inbox_check_me

Check email deliverability by testing inbox placement across major providers, verifying authentication, and analyzing spam filter results.

Instructions

Return this API key’s metadata: tier, enabled features, allowed providers, current daily/monthly usage vs. limits.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior3/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It clearly indicates this is a read-only operation ('Return') that retrieves metadata, but does not mention potential limitations like rate limits, authentication requirements, or error conditions. The description adds basic behavioral context but lacks depth for a tool with no annotation coverage.

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

Conciseness5/5

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

The description is a single, well-structured sentence that efficiently communicates the tool's purpose and scope. Every element ('Return', 'API key's metadata', specific metadata items) earns its place with zero wasted words, making it front-loaded and immediately understandable.

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 the tool's simplicity (0 parameters, no output schema, no annotations), the description is reasonably complete for a metadata retrieval operation. However, without annotations or output schema, it could benefit from mentioning the return format or any authentication requirements. It covers the core purpose adequately but has room for more contextual detail.

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

Parameters4/5

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

The tool has 0 parameters with 100% schema description coverage, so the baseline is 4. The description appropriately doesn't discuss parameters since none exist, maintaining focus on the tool's purpose without unnecessary parameter information.

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

Purpose5/5

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

The description clearly states the specific action ('Return') and resource ('this API key's metadata') with detailed scope ('tier, enabled features, allowed providers, current daily/monthly usage vs. limits'). It distinguishes itself from siblings like 'create', 'delete', 'list', and 'status' by focusing on metadata retrieval rather than management operations.

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

Usage Guidelines4/5

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

The description implies usage context for checking API key metadata, but does not explicitly state when to use this tool versus alternatives like 'inbox_check_status' or 'inbox_check_list'. It provides clear context about what information is returned, but lacks explicit exclusions or named alternatives.

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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