wafeq_expenses_partial_update

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

Annotations already declare readOnlyHint=false, destructiveHint=false, and idempotentHint=true, and the description's '🟡 WRITE · updates data' is consistent with those, so there is no contradiction. The description adds the PATCH verb and resource path but discloses no behavioral context beyond the annotations—critically, it never states that partial update means only supplied body fields change while omitted fields are preserved. Neutral and non-contradictory, but with little added value.

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 compact and front-loads the method and path, which is good. But 'Partial update expense' and 'Endpoint for partially updating an existing expense' are redundant restatements of each other and of the tool name, so not every line earns its place. Could be trimmed to one tight sentence without losing 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?

For a complex PATCH tool with a nested body and no output schema, the description is too thin. It doesn't explain partial-update semantics (which fields are affected, that omitted fields are left untouched), how to choose between this and wafeq_expenses_update, or what the response looks like. The rich schema and idempotency annotations cover a lot, but the missing usage and behavioral context leaves an agent to infer the most important operational detail.

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?

The description adds no parameter information at all, so the schema carries the burden. Schema coverage is 67% at the top level: idempotency_key is excellently documented in the schema, the nested body properties are individually well described, but id has no description and the body's own description is the generic 'An entity that can have attachments,' which adds no meaning for an expense. The description neither compensates for these gaps nor reinforces the strong parts.

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 ('partially updating'), resource (Expenses), and the HTTP method/path (PATCH /expenses/{id}/), so an agent knows what operation this performs. However, it doesn't explicitly contrast with the sibling wafeq_expenses_update, and 'Endpoint for partially updating an existing expense' largely restates the title/name rather than adding differentiation.

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 guidance on when to use this tool versus alternatives. The sibling set includes wafeq_expenses_update (full update), create, destroy, and mark_as_draft/posted, but the description never tells an agent to prefer partial update when only some fields need changing or to avoid it when a full replacement is intended. No prerequisites or exclusions are mentioned.

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