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

Annotations already declare readOnly/idempotent/non-destructive, so the safety profile is covered. The description adds real behavioral content beyond that: the read-only branch returns enable_changes_url and the player can enable changes without reconnecting, which is actionable recovery information an agent could not infer from the schema or annotations.

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?

Capability check and the write-before-use guidance are front-loaded in the first two sentences, with the return-value detail after. The trailing 'Read-only.' is redundant with readOnlyHint=true and adds no new 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 must explain returns — it does so for the read-only branch (enable_changes_url) but not for the writable branch, leaving the success shape unstated. For a zero-parameter status tool this is otherwise sufficient to call correctly.

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?

The tool takes zero parameters, so there is nothing to disambiguate and the baseline of 4 applies. The description correctly implies a no-argument call.

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 ('check what this MCP connection may do right now') and names the two possible outcomes (read-only vs. save/propose changes). It also explicitly distinguishes itself from the sibling get_connections by scoping that one to the player's data sources (RFEG, Garmin, TrackMan).

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 two concrete triggers: before a write, and when a write tool is missing from the list — the second is a genuinely non-obvious diagnostic case. It also routes to get_connections for a different question. Minor gap: it never mentions get_write_status or get_priority, siblings that plausibly overlap, so the agent must infer the boundary.

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