get_api_credentials_status

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

With no annotations provided, the description carries the full burden of disclosing behavior. It states the tool checks configuration without exposing the full key, which is a key behavioral trait. However, it does not explicitly state that the tool is read-only or has no side effects, nor does it mention any authentication or rate limit considerations. This is adequate but not fully transparent.

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, concise sentence that conveys the tool's purpose and key behavior without any wasted words. It is appropriately sized for the tool's simplicity and is front-loaded with the core function.

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?

While the tool has no parameters and the description covers the basic purpose, it lacks information about the return value or output format. Since there is no output schema, the description should clarify what the tool returns (e.g., a boolean or status message). The description is incomplete for a tool with no output schema, leaving the agent to infer the response structure.

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 input schema has zero parameters, so schema coverage is 100% and the description does not need to add parameter information. According to the guidelines, 0 parameters yield a baseline of 4, which is appropriate here.

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 tool checks if MAILGANER_API_KEY is configured and specifies it does not expose the full key. This is a specific verb plus resource, and it distinguishes this tool from sibling tools like get_cache_health or get_doc_status, which check different aspects.

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 no guidance on when to use this tool rather than alternatives. There is no mention of context, prerequisites, or a list of use cases. Given the simplicity of the tool, a brief note on when it's appropriate would be helpful but is absent.

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