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

Annotations already declare readOnlyHint, idempotentHint, and openWorldHint=false, so the safety profile is covered. The description adds behavior beyond that: the results are sorted most-recent-first and each entry exposes an id, which is what an agent needs to plan the follow-up call.

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 short sentences, both earning their place. Ordering is stated first and the id/follow-up detail second, so the most useful information is front-loaded with zero filler.

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 zero-parameter, read-only list with an output schema that documents return values, the description covers purpose, ordering, and follow-up usage. Only minor gaps remain, such as whether an empty timeline is possible, which the output schema can reasonably carry.

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?

There are no parameters, so the baseline is 4; the description correctly implies an unfiltered full listing rather than hinting at hidden filtering options. Nothing in it misleads about inputs.

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 identifies the resource ('career timeline') and its ordering ('most recent first'), which makes clear this is a listing tool. It also implicitly distinguishes itself from get_experience by noting entries carry ids 'for use with get_experience', though the verb itself is only conveyed by the tool name.

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?

It gives clear chaining guidance: call this to get the timeline, then use the per-entry id with get_experience for detail. That effectively routes the agent between two siblings. It stops short of a full when-not statement, but for a zero-parameter list tool the context is unambiguous.

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