zig_changelog

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

With no annotations, the description must fully disclose behavioral traits. It only states the output ('release-notes digest') but not whether the operation is read-only, whether it makes network calls, whether the 'force' parameter triggers a refresh, or if there are any side effects. This minimal disclosure leaves significant ambiguity for a fetch-style tool.

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, concise sentence that is front-loaded with the core purpose. It is efficient and easy to parse. However, it omits parameter information, making it less complete though still appropriately sized for the tool's simplicity.

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 two optional parameters and an output schema, the description should explain what both parameters do and when to set them. It does neither. The output schema exists, so return format is covered, but the parameter semantics are entirely missing. The tool is simple, yet the description fails to equip the agent to use it correctly.

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 input schema has two parameters (force, channel) but neither has a description, and the schema coverage is 0%. The description does not mention these parameters at all, so the agent has no explanation of what 'force' or 'channel' control. This is a critical gap for a tool with optional parameters.

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: it provides a digest of release notes for the current version of a given channel. The phrase 'what changed' conveys the specific information returned. This distinguishes it from sibling tools like zig_version_status (version info), zig_update (update action), and zig_search (search).

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?

There is no guidance on when to use this tool versus alternatives. It does not mention any situational context, such as 'use this to see recent changes' or 'for details on a specific version use zig_search'. No exclusions or comparisons to siblings are provided.

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