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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so safety is covered. The description adds real value by disclosing that some returned details (e.g., missing setting names) are sourced from the app's own repository, hinting at data provenance and possible staleness. It says nothing about how many deployments are covered or what happens when no deployment exists.

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 front-loaded sentences with no filler: shape of the return value first, provenance caveat second. Nothing is repeated from the title or the annotations.

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 two-parameter read tool with no output schema, the description conveys enough of the return shape (timeline plus per-step supporting details) to set expectations. Minor gaps remain around empty-state behavior and how 'limit' relates to the timeline, but nothing essential to invocation 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 coverage is 50%, and the description contributes no parameter meaning at all. In particular, the schema calls 'limit' the number of 'most recent entries' while the description talks about a timeline of steps, leaving it ambiguous whether limit caps deployments or per-step detail entries.

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 names a specific verb and resource ('Returns a plain-language timeline of an app's most recent deployment') and scopes it to the latest deployment, which separates it from deploy and publish_files. It never names the nearest sibling, get_status, so an agent still has to infer which read tool to pick.

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 when-to-use statement and no mention of alternatives, exclusions, or prerequisites. An agent learns the resource scope only from 'most recent deployment' and must guess whether get_status is the better call for quick health checks.

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