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

Annotations already declare readOnly/idempotent/non-destructive/closed-world, so the safety profile is covered. The description adds genuinely new context: the dual auth path (credential argument or Authorization header) and a credential-handling guarantee (never in URLs, never echoed in errors), plus the P4 self-certification boundary.

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 tight clauses with the purpose front-loaded, then auth mechanics, then the safety guarantee. Dense but largely waste-free; the only cost is unexplained shorthand (P4/P5) that a reader must already know.

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?

Annotations cover safety and there is no output schema, but the description never indicates what the returned "next author step" looks like or how the caller should act on it, leaving the response shape undefined for a status-style tool.

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 100% and the single credential parameter is already documented as a write-only private key, so the baseline would be 3. The description goes beyond the schema by explaining the alternative of configuring the connection Authorization header, which the schema does not mention.

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 concrete verb+resource: reading the caller's "exact next author step" within the author workflow (upload through P5). This is distinguishable from sibling write tools like submit_author_action and from preview_author_step, though it relies on undefined workflow-phase jargon (P4/P5) and does not explicitly name a contrasting sibling.

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?

Usage is implied (check your current authoring step) and one boundary fact is given ("the author cannot self-certify P4"), but there is no explicit when-to-use vs. when-not, nor any pointer to alternatives such as preview_author_step, certification_status, or idempotency_status.

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