api_keys_ready

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It describes a read-only listing operation but does not cover aspects like response format (e.g., list structure, data fields), potential errors, or performance considerations (e.g., rate limits). For a tool with zero annotation coverage, this leaves significant gaps in understanding its behavior.

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 a single, efficient sentence that front-loads the key information ('List services...') without any redundant or unnecessary details. Every word contributes to clarifying the tool's purpose, making it optimally concise and well-structured.

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?

Given the tool's simplicity (0 parameters, no output schema, no annotations), the description adequately covers the basic purpose. However, it lacks details on output (e.g., what data is returned, format) and behavioral context (e.g., how results are filtered or sorted), which would be helpful for an agent to use it effectively, especially without annotations.

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?

The tool has 0 parameters with 100% schema description coverage, so the schema fully documents the lack of inputs. The description adds no parameter information, which is acceptable here as there are no parameters to explain. A baseline of 4 is appropriate since no compensation is needed for missing parameter details.

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 specific action ('List services') and resource ('that have API keys filled in and are ready to inject to Railway'), distinguishing it from siblings like 'api_keys_missing' (which would list services without keys) and 'api_keys_inject' (which performs an action rather than listing). The verb 'List' is precise and the scope is well-defined.

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 implies usage context by specifying 'ready to inject to Railway,' suggesting this tool is for checking preparedness before injection operations. However, it does not explicitly state when to use it versus alternatives like 'api_keys_summary' or 'api_keys_missing,' nor does it provide exclusions or prerequisites, leaving some ambiguity.

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