timeline

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

No annotations are provided, so the description carries full behavioral burden. It usefully discloses that the tool takes no input and returns citations, implying a static read-only lookup with no side effects. Beyond that, it says nothing about return format or how comprehensive the response is.

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?

Single dense sentence that front-loads the covered topics (financial years, directive changes, transposition deadlines) before the details. Effective, though the parenthetical lists make it slightly heavy for a no-arg lookup.

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-parameter informational tool with no output schema, the description enumerates the covered content areas (2024-2026 set, Member State option, FY2027 thresholds, FY2028 third-country rules, directives, deadlines), which is sufficient for an agent to know what it will receive.

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 are no parameter semantics to explain; baseline 4 applies. 'No input' correctly confirms the empty schema.

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 resource: the CSRD reporting timeline covering which entities report for which financial years, how the dates changed via named directives, and transposition deadlines. It is reasonably distinguishable from siblings (sources, csrd_scope, thresholds) by centering on the date dimension. The vague name 'timeline' alone would not convey this, but the description carries the meaning.

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 infers it should call this when it needs reporting-timeline/date information. There is no explicit when-to-use vs alternatives guidance and no exclusion telling the agent to use 'thresholds' or 'csrd_scope' instead for those specific concerns, despite topical overlap (FY2027 thresholds, citations).

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