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

Annotations already declare readOnlyHint=true, openWorldHint=false, destructiveHint=false, so safety is covered. The description adds that results are paginated and exposes the underlying REST path, which is mild extra context, but it says nothing about authentication requirements or what a page contains.

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 sentences, front-loaded with the action and scope. The trailing GET path is largely redundant with the tool name and parameters but is compact enough not to be wasteful.

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?

For a simple read-only paginated list with no output schema, the definition covers the essentials (resource, filters, pagination). It omits what a page returns, default page/limit behavior, and how it relates to the other account-friend endpoints, leaving modest gaps.

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 75% (side, status, and limit are documented; page is not). The description's 'by status and side' merely restates schema enum semantics and adds no syntax, defaults, or format detail beyond what is already there, 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?

States a specific verb ('Get') and resource ('friendships') plus the two filter dimensions (status, side) and that results are paginated. It is reasonably distinct from the account-friend siblings, though it never names them (e.g. get_account_friend_all_status, get_account_friend_rejected) to make the boundary explicit.

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 guidance, no exclusions, and no pointer to the sibling tools that fetch all statuses or only rejected friendships. The agent must infer selection from the parameter names alone.

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