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

Annotations already declare readOnlyHint=false, destructiveHint=true and openWorldHint=true; the description adds genuinely new context by promising a partial update (untouched fields preserved) and by noting that foreign property_ids are rejected. It does not say whether changes are reversible, what permissions are required, or whether confirmation is expected for a destructive call.

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?

Front-loaded with the action and the partial-update rule, then compact per-parameter notes with no filler. It is efficient, though the language mismatch with the surrounding English tool ecosystem slightly reduces scannability.

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?

A destructive, open-world mutation with an output schema present, so return values need not be described. The description covers the mutation semantics and ID validation but leaves the agent without permission/irreversibility context needed to invoke a destructive write confidently.

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%, so the description carries the burden and it does address all five parameters at a conceptual level (property_id scoping, optional workspace slug, and the three editable fields). But it omits the format conventions an agent would most likely get wrong — IANA time zone strings and ISO currency codes — so compensation is only partial.

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 plus resource ('GA4 Property-Stammdaten ändern') and enumerates the mutable fields (Name, Zeitzone, Währung), so it is clearly distinguished from ga4_create_property or ga4_list_properties. It stops short of naming a sibling explicitly, which keeps it from 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?

Useful operational rules are given: only supplied fields are changed and at least one must be supplied, plus property_id must belong to the workspace or it is rejected. However there is no explicit statement of when to prefer this over related tools (e.g. create vs. update) or any prerequisite/confirmation guidance.

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