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

Beyond the annotations, the description discloses substantial behavioral context: the elevated admin permission requirement, the inability to change reporting currency, the fact that disabling advanced periods never hides existing records, and the mandatory confirmation workflow with explicit user consent. It also warns that CRM field values must be treated as untrusted data. This is far richer than the annotation set alone and makes the tool's real-world behavior predictable.

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 long but dense and organized into two clear paragraphs: one for scope/permissions/fields, and one for the confirmation workflow. Nearly every sentence adds necessary operational or safety context. It is slightly repetitive in places (e.g., restating that this is a rare admin change) but not bloated enough to lose focus.

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 high-stakes mutation tool with 11 parameters, no output schema, and sparse schema descriptions, the description covers what an agent needs to invoke it correctly: permissions, field scope, validation constraints, recurrence behavior, the confirmation protocol, and data-trust guidance. The missing return-value details are not essential for a state-changing workspace update, and the required confirmation/idempotency mechanics are already encoded in the schema.

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 only 9%, so the description carries most of the semantic load. It lists all the key updatable fields and adds a crucial validation constraint: defaultPriceIntervalMonths is restricted to 1, 3, 6, or 12 unless advancedIntervalsEnabled. It also explains the behavioral consequence of disabling advanced intervals. Most enum-based parameters are self-explanatory from the schema, but the description does not deeply explain every parameter, so a 4 is appropriate.

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 opens with a precise verb+resource statement: "Updates the workspace's commercial defaults." It then enumerates the affected fields and explicitly carves out reporting currency as out of scope, which distinguishes it from related deal-commercial and currency-rebase operations. This gives an agent a clear, unambiguous picture of what the tool does.

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 strong when-to-call guidance: only a workspace admin may call it, write consent is insufficient, and it is a rare change requiring explicit user go-ahead in the same turn. It also states when not to use it (reporting currency changes). However, it does not explicitly name a sibling tool such as get_workspace_commercial_settings as the alternative for read-only looks, so it stops just short of full alternative-routing guidance.

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