a2a_card

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

With no annotations provided, the description must carry the full burden of disclosing behavioral traits such as side effects, authentication needs, or rate limits. It fails entirely: the description is only a name repetition and reveals nothing about 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 extremely short but lacks substance. It is under-specified rather than concisely informative. Every sentence should earn its place; this single sentence does not add value.

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 has no parameters, an output schema exists but is not detailed, and there are 16 sibling tools, the description should minimally hint at the tool's role (e.g., retrieving or exposing an agent card). The current description is insufficient to distinguish it from siblings or explain its value.

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 is empty (0 parameters) and schema coverage is 100%, so there is nothing to document. The description does not add meaning but also has no parameters to clarify. Following the guideline, 0 parameters with high coverage baseline is 4; the description does not detract from this.

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 is a tautology: 'YodMCP A2A Agent Card' merely restates the tool name 'a2a_card' without adding any concrete information about what the tool does. It does not specify any verb or resource action, making it useless for an AI agent to understand its purpose.

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 or when not to use this tool. There is no mention of alternative tools, context dependencies, or prerequisites, leaving the agent without decision-making support.

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