Timeline

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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds useful ordering behavior (newest first) and the recorded event taxonomy, but says nothing about pagination limits in practice or the shape of a returned event.

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 tightly written sentences: the first front-loads what the log is and its ordering, the second supplies concrete query examples. No filler or redundancy.

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 read-only listing tool with full schema coverage and strong annotations, the definition covers enough to call it correctly. The remaining gap is that the fields making up each timeline event are never described and there is no output schema, so the agent must discover the entry shape empirically.

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 100%, with tag, limit/default, scope enum, and since/until formats all documented in the schema itself. The description adds no syntax or interpretation beyond that, so the 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?

The description states a concrete verb-like resource: a chronological log of memory events, newest first, and enumerates the event kinds it records (remembered, recalled, reinforced, linked, forgotten). That taxonomy is enough to separate it from siblings like recall or remember, though no sibling is named explicitly.

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?

Concrete usage contexts are given via example questions ('what did we decide last week?', 'what did you look up this session?'), which tells the agent when this tool is the right choice. It stops short of stating when not to use it or naming an alternative sibling.

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