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

Annotations already declare readOnlyHint=true and idempotentHint=true, so the safety profile is covered. The description adds that a summary is scoped to the authenticated user's team and that older periods are retrievable, which is useful context. It does not add anything about freshness/latency or what happens beyond the 4-period limit, and the listed sections largely restate the output schema.

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?

Three compact sentences, front-loaded with the core action and resource, then the content breakdown, then the parameter hint. No filler. The content enumeration is slightly listy but still earns its place by telling the agent what the output covers.

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 single optional parameter read-only tool with an output schema and annotations, the description covers purpose, scope (team, latest period), content, and how to go back in time. The only meaningful gap is that it does not point the agent to the more specific sibling tools when a narrower summary is needed.

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?

With one parameter at 100% schema coverage, the schema already documents the default of 0 and the max of 4. The description only repeats the retrieval intent ('Use weeks_ago to retrieve older summaries') without adding format or edge-case detail beyond the schema. Baseline 3 is appropriate when the schema carries the semantics.

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 and resource ('Get the latest weekly changelog summary for the authenticated user's team') and enumerates what the summary contains (TL;DR, executive summary, feature highlights, fixes, team highlights). That makes the deliverable concrete. It does not explicitly differentiate itself from near siblings like get-team-insight-summary-tool or get-team-overview-tool, so it stops short of a 5.

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?

'Use weeks_ago to retrieve older summaries' gives parameter-level usage but no when-to-use versus alternatives guidance. There is no statement of when this summary is preferable to get-team-insight-summary-tool or get-my-insights-tool. Usage is implied by the purpose rather than spelled out.

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