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

readOnlyHint=true already establishes the safety profile, so the description's job is to add context — and it does: it discloses the null-return case and the explicit guarantee that secrets are never returned. It also explains the semantic role of the event channel (webhook subscribed to `smart_link.scanned`) and that `capabilities.apply` governs which apply instructions the POS executes. No pagination or rate-limit context is offered, which is the remaining gap.

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?

A single dense sentence that front-loads the resource and then unpacks its fields, with no filler. The nested em-dash parentheticals are heavy but each clause carries information that has nowhere else to live, given there is no output schema.

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 usefully carries the return shape (owner app, event channel, article search URL, capabilities.apply, null case, secret redaction), which is exactly what an agent needs to interpret the response. It falls short only on routing — an agent learning nothing about when get_pos_connection is preferable to set_pos_connection.

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?

There is a single optional param (orgId) with 100% schema description coverage, and the schema already explains it references `list_orgs` and is omittable for single-org API keys. The description adds nothing about the parameter, so the baseline of 3 applies.

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?

The description precisely enumerates what the tool returns: the connected app that owns the POS connection, its event channel (a webhook endpoint subscribed to `smart_link.scanned`), the article search URL, and `capabilities.apply`. The `— or null` clause makes the retrieval action implicit but unmistakable. It does not, however, explicitly distinguish itself from set_pos_connection / delete_pos_connection beyond the read-only framing.

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?

There is no when-to-use or when-not-to-use guidance, and no alternative is named despite set_pos_connection and list_pos_identifications being adjacent siblings. The only usage signal is implied by the readOnlyHint annotation and the resource-shaped phrasing.

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