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

With no annotations, the description carries the full burden for a mutating tool, yet it discloses nothing beyond the bare action: no permission/auth requirements, no duplicate-handling or idempotency behavior for the uid, no statement of what is returned (e.g. the new supplier ID), and no reversibility note. "In the account" hints at scoping but that is the only added context.

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?

A single front-loaded sentence with zero waste. It is efficient but so terse that brevity shades into under-specification rather than tight, informative prose.

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 creating mutation with 7 parameters, 4 required, no annotations and no output schema, the description should cover at minimum what happens on duplicate fiscal codes and what the caller gets back (the created supplier identifier). None of that is present, leaving real gaps an agent must guess at.

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 all seven fields including the optional uid, email and telephone are already documented in the schema. The description adds no meaning beyond that, which is the expected baseline when the schema does the heavy lifting.

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 ("Create a new supplier") and scopes it to "the account". The intent is unambiguous, though it never names how it relates to siblings like create_supplier_invoice or update_supplier — the name alone carries that 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 versus update_supplier (for existing suppliers) or search_suppliers (to check for duplicates), and no prerequisites such as required account setup or unique fiscal code rules. The agent must infer all routing 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.