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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds nothing beyond the title: no cursor semantics, no timeout/keep-alive behavior for the long-poll, no explanation of what 'include' streamed deltas actually delivers, and no hint that this is a repeated/incremental call.

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?

It is a single short line, but that brevity reflects under-specification rather than discipline — the entire text is a restatement of the title. Nothing is front-loaded because there is nothing beyond the title to load.

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?

This is a streaming tool with five parameters (cursor, wait window, type filter, delta/tool inclusion) and no output schema, so the description carries the burden of explaining streaming behavior. It instead repeats the title and leaves the cursor pagination model, the wait semantics, and the long-poll-vs-SSE distinction entirely unexplained.

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%, so the baseline of 3 applies; the schema documents all five parameters. The description adds no meaning beyond the schema, so it neither compensates nor earns more than the baseline.

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?

Tautological: description restates name/title.

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?

No guidance is given on when to tail versus fetch events with a sibling tool, nor on how the long-poll mode relates to the SSE mode or when to prefer one. The mention of two modes implies a usage choice but never states the selection criterion, and no prerequisites are given.

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