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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered structurally. The description adds only that this is 'one composite call' aggregating several analysis categories, which hints at cost/behaviour but does not discuss latency, aggregation limits, or empty-result behaviour.

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 sentences with minimal waste, and the use-case framing is front-loaded before the enumeration of contents. Slightly gimmicky quote framing, but nothing that could be dropped without losing the routing cue.

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?

An output schema exists and annotations are rich, so return-shape and safety details need not be restated. The description covers purpose, contents, and a param hint; the only real gap is the unexplained object_id, which is minor given the overall coverage.

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% with two required parameters, so the description carries the burden. It clarifies that 'memory' is a slug, which is genuinely useful beyond the bare schema, but 'object_id' is left completely undefined (no hint that it is an integer object identifier from this memory's graph).

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?

The description states a specific verb (get) and a specific composite resource (change impact), and enumerates what the blast radius contains: event-class neighbours, actions touching it, property conflicts, top related objects, and provenance. This makes it distinguishable from plain lookups like get_object or get_graph, though it never names those siblings directly.

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 framing question ('What should I watch out for if I change this object?') implicitly tells the agent this is a pre-mutation impact check rather than a general read. There is no explicit when-not guidance and no named alternative for simpler lookups, so usage is implied rather than specified.

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