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

With no annotations, the description carries the burden, and 'Report' does signal a read-only informational operation while 'for the caller' hints at per-caller scoping rather than a global view. However, it does not say whether 'connections' means active vs. total, whether auth is required, or anything about cost/latency for what is presumably a lightweight snapshot.

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 front-loaded sentence naming both metrics with no filler or redundancy; nothing could be cut without losing information.

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?

For a zero-param, no-annotation, no-output-schema tool the description names the two returned data points, which is the minimum needed to call it. It still leaves the exact response shape ambiguous (field names, whether counts are per-collection, connection semantics), and with no output schema the description is the only place that could clarify those.

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 the baseline is 4; there is nothing for the description to disambiguate, and the 'for the caller' phrasing correctly signals the results are scoped by identity rather than by input.

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 (report) and two concrete resources (database connections, stored document counts), which distinguishes it from document-reading siblings like get_database_document or list_database_documents. It stops short of explicitly naming those siblings as alternatives.

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?

Usage is only implied: an agent can infer this is a health/count check to run before or instead of listing documents, but the description gives no explicit when-to-use or when-not-to-use conditions and no alternative tool names.

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