create_instance

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

No annotations provided, so description must carry behavioral info. It reveals free tier is quick, paid returns a Stripe URL. However, does not disclose side effects (e.g., if duplicate name errors, if it requires auth/account). Some gaps.

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?

Multiple sentences each adding value, no fluff. Slightly verbose but well-structured 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?

Missing output description. Tool has no output schema, so description should explain what is returned (e.g., instance ID, URL, status). Only mentions result for free vs paid but not the full return 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?

Schema coverage is 100%, so baseline applies. Description adds tier details (sizes, costs) but does not add beyond schema for 'name'. Adequate but not exceptional.

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?

Clearly states it creates a managed Valkey/Redis cache instance on cachly.dev. Distinguishes from sibling tools (none other for creation).

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?

Provides context on free tier speed (30s), paid tiers return checkout URL, and suggests starting with 'free' for testing. Does not explicitly mention when not to use, but sufficient for a creation tool.

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