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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered by structured data. The description adds nothing beyond that – no behavior on a missing/nonexistent id, no permission requirements, no note on what a returned organization 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?

One compact sentence with the verb and lookup key front-loaded and zero filler. It is appropriately sized for a trivial single-entity read, though it provides no structure beyond the one clause.

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 one-parameter read tool with complete schema coverage and full annotation coverage, the definition is workable but thin: it says nothing about failure/not-found behavior and, with no output schema present, nothing about what the fetched organization yields.

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 100% and the single parameter is documented in the schema as "The numeric id of the organization to fetch." The description's "numeric id" merely restates it, adding no format, range, or sourcing guidance.

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?

Names a specific verb ("Fetch") and resource ("a single organization") plus the key (numeric id), which cleanly separates it from list-organizations-tool, update-organization-tool, and delete-organization-tool. It does not explicitly name any sibling as the alternative, so it falls just short of a 5.

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?

Usage is only implied: the phrase "by its numeric id" signals that this is the tool to reach for when the id is already known and the list tool would be wasteful. There are no explicit when-to-use/when-not statements, no mention of list-organizations-tool as the alternative, and no prerequisites.

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