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

No annotations are supplied, so the description carries the full disclosure burden. It does add one valuable fact — the tool is gated to paid plans — but says nothing about whether `since` is exclusive, result ordering, pagination/cursor behavior at the 1000 limit, or whether the feed is eventually consistent. For a sync primitive with zero annotation coverage, that is a significant gap.

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?

A single short sentence with no padding and the key concept front-loaded. However, the brevity here is under-specification rather than economy — the sentence is too small for the tool's role, so terseness does not fully earn 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, no annotations, and no parameter documentation, so the description is the only source of behavioral information — and it is one clause long. For a delta-sync endpoint whose return shape and cursor semantics are entirely undocumented, the definition leaves the agent guessing on essentials.

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 0%, so both parameters are undocumented in the schema. The phrase "after a sequence number" does clarify that `since` is an exclusive lower bound, which is real added meaning, but `limit` is never mentioned and no format, bounds, or default behavior is explained in the description.

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?

"Entities changed after a sequence number" states a change-feed operation, but "entities" is never specified — the agent cannot tell what resource type is returned, and none of the siblings (get, query, search, changes) is referenced to disambiguate. The parenthetical "(paid plans)" adds a qualifier rather than clarifying the purpose.

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?

The only usage signal is the implicit "paid plans" availability note. There is no guidance on when to call this versus get/query/search, no mention of polling cadence for incremental sync, and no statement about what to do with the returned sequence number. The agent must infer the entire delta-sync workflow.

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