cachly-mcp-server

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the tool lists instances with details, but doesn't cover critical aspects like whether it requires authentication, how it handles errors, if results are paginated, or what format the output takes. 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 core action ('List all your cachly cache instances') and adds useful detail ('with their status and connection details'). Every word contributes meaning without redundancy, making it highly concise and well-structured for quick comprehension.

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 low complexity (0 parameters, no output schema, no annotations), the description is adequate but incomplete. It covers the basic purpose but lacks behavioral context (e.g., authentication needs, error handling) and output details, which are important for a listing tool. Without annotations or output schema, the description should do more to compensate, but it minimally suffices for a simple operation.

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, and schema description coverage is 100% (since there are no parameters to describe). The description appropriately doesn't discuss parameters, focusing instead on the tool's purpose. This meets the baseline for zero-parameter tools, as there's no need to compensate for missing schema information.

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 action ('List all') and resource ('cachly cache instances') with specific attributes ('status and connection details'). It distinguishes from siblings like 'get_instance' (singular) and 'cache_stats' (statistics rather than instance listing), though not explicitly named. It avoids tautology by providing meaningful detail beyond the tool name.

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?

No guidance is provided on when to use this tool versus alternatives like 'get_instance' (for a specific instance) or 'cache_stats' (for performance metrics). The description implies a broad listing function but doesn't specify prerequisites, such as needing active instances or permissions, leaving usage context unclear.

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