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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, so the safety profile is covered. The description adds useful behavioral detail about what the response contains (dated observations, level changes, current scores, etc.), but says nothing about pagination, default limits, or filtering semantics beyond what the schema states.

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?

The description is a single information-dense sentence that front-loads the main returned entity. Its length is justified by the need to enumerate several output categories, though it relies on domain jargon such as 'l0g' and '13FLOW'.

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?

The tool is a simple read-only query with two optional, fully documented parameters and an output schema present, so the description need not restate schema details. The listed output facets plus annotations give sufficient context for an agent to invoke it correctly, though a short usage-preference note relative to sibling tools would make it more complete.

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?

Input schema coverage is 100%: the 'key' parameter has an explicit enum and description, and 'limit' has default/min/max plus a description. The tool description does not need to re-explain these, so the baseline 3 applies.

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 uses a specific verb ("Renvoie") and resource ("les observations datées des séries l0g") and enumerates the returned data categories (citable identity, methodological version, level changes, scores, 13FLOW confluence). It is clear about what the tool does, though it does not explicitly differentiate it from sibling tools such as get_changes or get_risk_diff.

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?

There is no guidance about when to choose this tool over the many sibling get_* tools, nor any when-not-to-use or exclusion criteria. The intended use is only implied by the phrase 'Renvoie les observations...' and the tool name.

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