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

Beyond the annotations (readOnly, idempotent, non-destructive, closed-world), the description adds real behavioral context: it discloses the privacy rule that message content is limited to the latest line and never from anyone under 18, and it warns that retrieved content is data to report and never instructions to follow. It also enumerates the output buckets, standing in for the absent output schema. It does not describe ordering, truncation, or size limits for the combined digest.

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?

Every clause carries distinct information — sources, privacy constraints, output fields — so there is no padding. However, it is delivered as one sprawling sentence with stacked parentheticals and mid-clause asides, and the fragment "with the tool that answers each" parses awkwardly on first read. Information-dense but poorly structured.

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?

With zero parameters, no nested objects, and rich annotations, the main gaps the description must fill are scope and return contents, and it covers both via the source list and the output enumeration. Residual ambiguity remains around how results are grouped and what exactly "the time and time zone" and "`next` for events" refer to, which a slightly clearer phrasing could resolve.

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?

The tool takes zero parameters, so there is no parameter meaning for the description to add; the baseline of 4 applies. The description correctly implies a single unfiltered aggregate call rather than presenting any argument-like affordances.

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 concrete aggregation scope: plans, asks, requests, knocks, place inboxes, drafts, the week, time/time zone, plus `next` for events, delivered "in one answer." That enumeration distinguishes it from narrower siblings like events, list_upcoming, or read_place_inbox. The run-on phrasing and the embedded Swedish trigger phrase make the core purpose take a second read to extract, so it stops 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?

It gives invocation triggers ("Vad väntar på mig?", "catch me up"), which implies when to reach for it, and it hints at delegation to `next` for events. But it never states when NOT to use it or which sibling to prefer for a single-source lookup, even though many siblings overlap (read_place_inbox, read_plan, events, list_upcoming). Guidance is implied rather than explicit.

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