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

Annotations already declare readOnlyHint=true, destructiveHint=false and closed-world, so the safety profile is covered. The description still adds real value beyond them: a hard cap of the last 30 entries, the presence of before/after sections per entry, and 'Free' (no cost incurred) — behavioral facts not present in any structured field.

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?

One telegraphic sentence, front-loaded with the resource and immediately followed by the covered change types, the entry cap, the returned structure, and cost. Nothing is redundant; every clause carries a distinct fact.

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 no output schema, the description carries the burden of return shape and does partly deliver (30 entries, before/after sections). It leaves open ordering (newest first?), whether older history is retrievable at all, and what the 'agent' change category contains, which are relevant for a history-inspection tool.

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%, but the schema's own description is just 'TitleID.', so the schema is not doing much explanatory work. The description's 'The Title's' confirms the parameter is a title identifier but adds no format, source, or validity guidance, so it stays at baseline.

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 resource ('The Title's config change history') and enumerates the change types it covers (tuning, agent, creation, undo), so an agent can distinguish it from mutation siblings like tuning_apply or tuning_undo. It never names a sibling explicitly, but the noun phrase alone makes the read-history role 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?

Usage is only implied: the tool obviously serves 'what changed recently' inspection, which a careful agent can infer. There is no explicit when-to-use, no exclusion, and no pointer to alternatives such as tuning_undo or get_title_data, so the routing decision is left to inference.

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