Amazing Marvin MCP

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

With no annotations provided, the description carries full burden for behavioral disclosure but only states what the tool does, not how it behaves. It doesn't mention authentication requirements, rate limits, error conditions, response format, or whether this is a read-only operation (though implied by 'Get'). For a tool with no annotation coverage, this is insufficient behavioral context.

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 perfectly concise - a single sentence that states exactly what the tool does with zero wasted words. It's front-loaded with the core functionality and doesn't include any unnecessary elaboration or repetition.

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 that there's an output schema (which handles return values) and only one simple parameter, the description is reasonably complete for its complexity level. However, with no annotations and multiple similar sibling tools, the description should ideally provide more context about what specific account information is retrieved and how this differs from other information-retrieval tools in the system.

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?

With 0% schema description coverage and only one optional parameter ('debug'), the description doesn't mention parameters at all. However, since there's only one parameter and it has a sensible default (false), the lack of parameter explanation in the description is less critical. The description could have explained what 'debug' mode does, but the minimal parameter count keeps this from being a major deficiency.

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 verb 'Get' and the resource 'account information from Amazing Marvin', making the purpose immediately understandable. However, it doesn't differentiate this tool from similar siblings like 'get_kudos_info' or 'get_productivity_summary_for_time_range', which also retrieve specific types of information from the same system.

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 versus alternatives. With multiple 'get_' sibling tools available (like get_kudos_info, get_goals, get_labels), there's no indication whether this tool provides comprehensive account data or specific subsets, or what context would make it preferable to other information-retrieval tools.

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