replay_timeline

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

Annotations already declare readOnlyHint=true, so the description's claim of read-only is consistent. It adds that it returns JSON string with timestamps, but does not disclose potential limitations like the default limit of 100 implying partial results.

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?

The description is concise with an engaging opener, clear parameter list, and return type. No redundant sentences; every part adds value.

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?

Covers purpose, parameters, return type, and prerequisite. However, it lacks details about pagination behavior beyond the limit parameter and the exact structure of the returned JSON, which could be helpful given the presence of a known output schema.

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 0% schema description coverage, the description fully explains all parameters: ISO timestamps for since/until, comma-separated filter for operations, and default for limit. This adds significant value beyond the schema structure.

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 clearly states it retrieves the full timeline of memory operations, listing specific event types. It distinguishes from siblings by emphasizing 'full timeline', though it doesn't explicitly differentiate from other replay tools like replay_memory.

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?

Provides a prerequisite (Pro tier/Novyx Cloud) but no guidance on when to use this tool versus alternatives. It implies it's for broad history but lacks exclusions or specific use cases.

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