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

Annotations already declare readOnlyHint=true, destructiveHint=false, openWorldHint=false, so the safety profile is covered. The description usefully adds that the return value is an SSE endpoint consumed via EventSource, which cannot be inferred from structured fields. It says nothing about URL lifetime, auth requirements, or what event types flow over the stream, which are the open behavioral questions for a signed-stream-URL tool.

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, zero filler, and the core purpose is front-loaded ahead of the practical instruction. Every clause earns its place.

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?

There is no output schema, and the description correctly compensates by explaining what is returned (an SSE URL) and how to consume it. What remains unstated — URL expiry, auth, event payload shape — is minor for a simple one-parameter lookup, but keeps it from a 5.

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 processId parameter is fully documented in the schema, so the baseline is 3. The description adds no extra semantics for the ID (e.g. where it comes from or how to obtain it).

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+resource ('Get the SSE stream URL') scoped to 'real-time optimization updates', which distinguishes it from sibling readers like get_model_optimization_status and get_optimization_details. It does not name a sibling explicitly, so it falls just short of 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?

'Connect to this URL with EventSource for live progress' gives clear context for when this tool is the right call — live streaming rather than one-shot status polling (e.g. get_model_optimization_status). No explicit exclusions or named alternatives, so not a 5.

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