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

Beyond the readOnly/idempotent annotations, it discloses default behavior when unconfigured (both auto-reply choices default on, AI Inbox off) and the required read:inbox scope and cost (free, changes nothing). That is real added context an agent cannot infer from annotations. It omits pagination/ordering behavior for what is otherwise a settings read.

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 front-loaded sentences covering what is read, defaults, and prerequisites; no wasted clauses. "Free; changes nothing" is slightly redundant with readOnlyHint but still supplies cost information.

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?

With no output schema, the description names the key returned fields and the default values an agent needs to interpret them, plus the permission and cost. That is sufficient for an agent to call it and use the result in a subsequent save without further documentation.

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% for the two params (limit, cursor), so the schema carries the meaning and the description adds nothing about them. Notably it never explains why a settings read is paginated, which would have helped beyond the schema.

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 (read saved automatic-reply settings plus per-account switches) and enumerates the concrete fields returned (auto_faq, private_buying, expectedVersion, expectedUpdatedAt). Read-only framing plus the expectedVersion hint clearly separates it from the sibling soclo_inbox_settings_save.

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?

"expectedVersion and expectedUpdatedAt values needed to save changes" tells the agent this is the read step in a read-then-save workflow, which is actionable context. It also states the read:inbox scope requirement, but does not explicitly name soclo_inbox_settings_save or an alternative.

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