settings_set

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

With no annotations, the description bears the full burden and carries it well: it discloses atomicity, rollback-on-validation-error behavior, that changes persist to config.toml, and even the key return fields. It does not cover authorization requirements or what happens to settings not named in the update set, which keeps it short of a 5.

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 tight sentences, front-loaded with the operation's defining trait (atomicity) and followed by persistence and return shape. No filler or restatement of the tool name.

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?

An output schema exists, so the mention of updated/reindex_required/warnings is a bonus rather than a necessity. The real gap is on the input side: for a nested, untyped object parameter the agent has no way to know valid keys or values from either the schema or the description.

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 0% for the single 'updates' parameter, which is an untyped free-form object. The description says only 'update writable settings' and never enumerates which settings are writable or what keys the updates object accepts, so the critical parameter remains undocumented in both places.

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+resource ('atomically update writable settings') and adds a meaningful qualifier ('writable') that separates it from the read-side siblings settings_get/settings_list and from settings_reset. It never names a sibling explicitly, so an agent must infer the boundary rather than being routed, but the purpose itself 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?

There is no when-to-use guidance and no mention of the closely related settings_reset, settings_get, or settings_list siblings. The atomic/rollback clause hints that this is the safe path for multi-key changes, but that implication is never stated as a selection rule.

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