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

Adds substantial behavioral context beyond annotations: free/no wallet, unauthenticated, only latest passing release, and the namespacing of computed vs self-reported facts. This enriches the readOnlyHint and openWorldHint without contradicting 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?

Three compact sentences: endpoint, content inventory, and a key structural note (namespacing). All sentences earn their place, front-loaded with the most decision-relevant facts.

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?

For a read-only manifest lookup with an output schema present, the description covers cost, auth, content, and data separation. Nothing essential for an agent to decide or invoke correctly is missing.

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 covers both parameters with examples at 100% coverage. The description only echoes the URL placeholders and adds no new meaning about parameter formats or edge cases, so it rests on the schema's baseline.

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?

States a clear verb ('read') and resource ('public manifest'), enumerates the exact content (file tree, sizes, licence, dependencies, security-scan result, release log), and ties it to a distinct use case (pre-purchase). It is unambiguous against siblings like fetch_release and purchase.

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 clear context ('free, unauthenticated', 'read it before you buy') that signals when to invoke it, but does not explicitly contrast with sibling tools or state when not to use it. The guidance is implied rather than explicit.

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