FinanceKit MCP

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

The description doesn't add behavioral context beyond what annotations provide. Annotations already declare readOnlyHint=true, indicating this is a safe read operation. The description doesn't disclose additional traits like rate limits, authentication needs, or what specific data is returned (though output schema exists). It doesn't contradict annotations, but adds minimal value beyond them.

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 concise and front-loaded with a single sentence that directly states the tool's purpose. There's no wasted language or unnecessary elaboration, making it efficient and easy to parse.

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 this is a read-only tool with full schema description coverage and an output schema, the description is reasonably complete. The output schema will handle return value documentation, so the description doesn't need to explain what data is returned. However, it could better address sibling tool differentiation.

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 description adds no parameter semantics beyond what the input schema provides. With 100% schema description coverage, both parameters (currency and limit) are fully documented in the schema. The description doesn't explain why these parameters matter or provide context beyond the schema's technical specifications.

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's purpose: 'Get the top cryptocurrencies ranked by market cap.' It specifies the verb ('Get') and resource ('top cryptocurrencies'), but doesn't explicitly differentiate from siblings like 'crypto_trending' or 'market_overview' which might provide similar data. This makes it clear but not fully distinguished from alternatives.

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 siblings like 'crypto_trending' and 'market_overview' that might overlap in functionality, there's no indication of when this specific ranking tool is preferred or what distinguishes it from other market data tools.

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