build_tail

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

No annotations provided. Description only states purpose ('show'), with no disclosure of side effects, authorization needs, or confirmation that it's read-only. Carries the full burden but adds minimal behavioral context.

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 concise sentences, front-loaded with purpose, followed by a usage note. No unnecessary words.

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?

Has output schema, so return value is documented elsewhere. Covers tag source and lines default, but does not explicitly mention that lines is optional or describe the output nature. Generally adequate for a simple tool.

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 has 0% description coverage. Description adds meaning for 'tag' (source from other tools) but not for 'lines'. Partially compensates for the schema gap.

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 'Show the tail of a build log', a specific verb and resource. Distinguishes from sibling tools like build_start, build_fetch, etc.

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 tells where to get the tag: 'Use the tag returned by build_start or listed in build_status'. Provides clear context but no exclusions or when-not-to-use.

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