Update ticket time entry

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

Annotations already declare readOnlyHint=false, idempotentHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds nothing beyond that — it never explains partial-update semantics (whether omitted fields are preserved or cleared), whether updates are reversible, or any permission requirements. For a mutation tool this is a meaningful gap even with annotations present.

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 sentences, front-loaded with the action and followed by the field inventory; no filler. The only inefficiency is that the second sentence duplicates the nested object's schema description rather than adding new information.

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?

With an output schema, full parameter coverage and annotations present, most of the structural burden is borne elsewhere. What remains missing is an explanation of update semantics (partial vs full replacement) and any side effects such as timer state changes, which an agent would need before invoking a mutation.

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 100%, so the schema already documents all three parameters, including the nested time_entry_fields list. The description reproduces the field list verbatim without adding format nuance beyond the 'hh:mm' and ISO-8601 hints already in the schema. 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?

States a specific verb and resource ('Update a time entry on a ticket') that an agent can map directly onto the update_ticket_time_entry name and distinguish from create_ticket_time_entry / delete_ticket_time_entry siblings. It stops short of explicitly differentiating itself from those siblings in text, but the intent is unambiguous.

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 gives no guidance on when to call this versus create_ticket_time_entry, view_ticket_time_entry, or delete_ticket_time_entry, and no prerequisites (e.g. that ticket_id and time_entry_id must already exist). The agent must infer usage entirely from the tool name.

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