Marketplace index seed

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

The annotations already include destructiveHint=true, so the description's 'guarded' qualifier and 'overwrite=false protects existing index files' adds useful context about when writes are safe and potential destructive behavior. This goes beyond the annotation without contradicting it.

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?

Two sentences, front-loaded with the core action and followed by practical usage guidance. Every sentence earns its place with no filler or unnecessary repetition of schema/annotation content.

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 file-writing tool with an output schema and a related sibling local_marketplace_index, the description covers the workflow position, key parameters, and safety semantics. It leaves out only trivial details that are already handled by the schema and defaults.

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 semantic meaning by mapping 'built-in seed entries' to include_builtin_starters and 'custom package entries' to entries, which is not fully explicit in the schema. It also explains the overwrite parameter's safety behavior, though out_file and name are not directly described; the schema partially covers these.

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 uses a specific verb 'Write' and identifies the resource as a 'guarded starter marketplace index JSON'. It clearly differentiates the tool by mentioning 'seed entries' and 'custom package entries', which aligns with its role as a seed generator distinct from the sibling local_marketplace_index.

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?

Explicitly instructs to 'Use this before local_marketplace_index when planning a local package marketplace', giving a clear workflow position and context. It also notes that 'overwrite=false protects existing index files', providing actionable guidance on the safe default behavior.

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