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

Annotations already declare destructiveHint=true and readOnlyHint=false, but the description goes beyond them by disclosing that changes hit live data immediately with no build, and that only the columns given are replaced while other values persist. It omits permission/auth requirements and reversibility, so it falls 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?

Three short sentences, front-loaded with the triggering condition, then mechanics, then the alternative. Every sentence carries a distinct decision-relevant fact with no padding.

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 return values need no explanation. The description covers trigger, immediate-write behavior, replacement semantics, and the sibling alternative; only auth/permission expectations and any rollback path are unaddressed for a destructive mutation.

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 75% (site_id is undocumented) and the description adds little parameter detail beyond 'the columns given' for the data object. The schema documents table and row_id adequately, so the description's marginal contribution is baseline-level.

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 ('change a record in one of their WebTwizz site's database tables') and grounds it with concrete examples (product price, booking time). An agent can distinguish it from add-site-data and edit-site without opening any schema.

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?

Gives an explicit when-to-use ('user wants to change a record') plus an explicit alternative and the condition that selects it ('Use edit-site instead for new tables or columns, or for content kept in the site's files'). Nothing 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.