update_timeline

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

With no annotations provided, the description bears the full burden of behavioral disclosure, yet it only restates what the name already implies: that the operation mutates an existing timeline. It does not disclose whether data is a partial patch or full replacement, how nonexistent IDs are handled, permission requirements, or idempotency.

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 only four words with no wasted verbiage, but this brevity is under-specification rather than deliberate conciseness — it essentially restates the tool name and front-loads nothing of substance.

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?

This is a mutation tool with three required parameters including a fully opaque nested data object, zero annotations, and no output schema. The description provides no payload shape, no call semantics, and no behavioral context, which is wholly inadequate for reliable invocation.

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 0%, and the description does nothing to compensate. It never clarifies that id is the timeline identifier, what campaignId refers to, or what shape the required data object must take. An agent cannot construct a valid invocation from the available information.

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 specific verb ('Update') and resource ('timeline'), and the qualifier 'existing' minimally distinguishes the operation from creation. However, it adds nothing beyond the tool's name pattern, which is identical across dozens of sibling update_* tools, so an agent learns no specifics about what updating a timeline entails.

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 provides no guidance on when to use this tool versus create_timeline, delete_timeline, or get_timeline, nor any prerequisites such as needing the timeline ID and campaign context. Tool selection is left entirely to inference from the sibling tool names.

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