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

Annotations already declare readOnlyHint=true, openWorldHint=false and destructiveHint=false, so the safety profile is fully covered. The description adds the useful detail that no live provider request is made, but that largely restates readOnly + no-network and discloses nothing about what state is read or how stale the stored plan may be.

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?

Two short front-loaded sentences with zero filler; the read-only/no-write constraint is stated immediately after the purpose.

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 agent gets only a hint that receipts are returned and no idea of the response shape, status fields, or failure modes. For a read tool whose safety annotations are complete, this is adequate but thin.

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%, so the description must carry parameter meaning, and it does not. 'one stored approval' loosely ties to approval_ref, but connection_context (with its mctx_v1_ pattern) is never explained and there is no indication how either value is obtained.

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 (Read) and resource (one stored mixed approval plus its receipts), and the phrasing implies it is the retrieval counterpart to approval_plan_prepare/confirm/deny. It does not explicitly name a sibling to contrast against, and 'mixed approval' is internal jargon an outsider cannot fully decode.

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?

The 'No provider requests or writes' clause signals this is a safe pure-read path, but there is no explicit when-to-use guidance such as 'use after approval_plan_prepare to inspect a plan' or when to prefer approval_plan_confirm/deny. Usage is only implied by the name and sibling set.

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