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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, so the safety profile is partly covered. The description adds value beyond them: it requires workspace settings permission, mandates confirmReviewed=true, states that existing projects are preserved despite the destructive hint, and scopes pronunciation notes as drafting-only guidance that does not retime or replace source speech.

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 dense, front-loaded clauses with no filler: what is saved, the gating requirements, then the behavioral consequence and a boundary on pronunciation notes. The last clause is arguably peripheral but does prevent a plausible misuse, so it earns its place.

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 not be described, and the description still covers permission requirements, the review confirmation gate, the destructive-but-project-preserving behavior, and the scope limit on pronunciation notes. The missing piece is idempotencyKey semantics for a non-idempotent-looking 10-required-param write.

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 0% across 10 required parameters, so the description must compensate. It names most content fields (brand name, audience, offer, conversion goal, tone, protected vocabulary, editorial preferences with pronunciation notes) and confirms confirmReviewed. However, idempotencyKey — a required, agent-generated parameter — is never mentioned, nor are format constraints or the enum values inside editorialPreferences.

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?

Specific verb ('Save') plus a concrete resource enumerated field-by-field (business name, audience, offer, conversion goal, tone, protected vocabulary, editorial preferences), scoped to 'the selected workspace'. It is unmistakably a write counterpart to workspace_context_get, but it never names that sibling explicitly, so the differentiation is inferred rather than stated.

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 real preconditions: the content must be 'user-reviewed', the caller needs workspace settings permission, and confirmReviewed=true is mandatory. It also frames the downstream effect ('changes future assistant guidance, preserving existing projects'), which tells the agent when this is the right tool. It stops short of naming the get/scan siblings the agent should read from first or describing a re-save/update workflow.

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