fetch_release_notes

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

With no annotations, the description carries the full burden and does disclose meaningful behavior: the authoritative data source, an explicit anti-hallucination guarantee ('never reconstructs them from training data'), and the failure contract ('returns found=false with a reason ... rather than guessing'). It does not cover auth requirements, rate limits, or network/error conditions beyond the not-found case, so it falls short of a 5.

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 action and source, followed by the failure-mode contract. No filler or redundant restatement of the tool name; every clause adds information.

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?

An output schema exists, so return-value shape needn't be explained, and the description still covers the source of truth and the found=false outcome. What remains thin is operational context (auth, rate limits, offline behavior), which matters for a GitHub-API-backed tool but is unmentioned.

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 description coverage is 100% and there is a single parameter whose schema already documents the expected format ('2.4.7'). The description adds no format, normalization, or range guidance beyond what the schema provides, so baseline 3 applies.

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 specific verb+resource ('Fetches Magento's own release notes') and names the exact source (magento/magento2 GitHub repo's Releases API), so the agent knows precisely what it gets and from where. It is clearly distinguishable from sibling tools like security_audit, check_updates, and upgrade_plan, which operate on installed projects rather than fetching upstream notes.

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?

The description implies usage (you supply a version and get that version's upstream notes), and the 'never reconstructs from training data' phrasing hints it should be preferred over inferring notes. However, it never explicitly says when to choose this over check_updates or upgrade_plan, nor are any prerequisites stated. Usage is implied rather than instructed.

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