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

readOnlyHint=true already tells the agent this is a safe read, so the bar is lower. The description adds that only *published* strategies are returned and that keys are current, which is useful scope context. It is silent on ordering, result size, or whether unpublished/draft strategies or revoked keys are excluded.

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?

Two short sentences, front-loaded with the core purpose and no filler. The second sentence is slightly misplaced in that it describes downstream usage of the returned keys rather than this invocation, but it is one line and adds real value.

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 no input parameters and no output schema, the description responsibly enumerates the return fields (strategies, URLs, keys), which compensates for the missing output schema. A five would require stating ordering or the published-only boundary more explicitly.

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?

Zero parameters, so the baseline is 4; the schema is fully covered and nothing needs explaining. The only risk is that mentioning 'expectedKey' may momentarily suggest this tool takes an argument, but the sentence correctly frames it as a key to hand to a replacement call.

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 (List) and resource (published website strategies) and even names the fields returned: URLs and current keys. It is clearly distinct from save_strategy, though it never names the sibling outright; the routing hint is implicit via the expectedKey reference.

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?

The second sentence gives a conditional ('only when the user asks to replace that saved strategy'), but it governs a key consumed by another tool (save_strategy), not this call. There is no guidance on when to call list_strategies instead of list_data or when it is unnecessary.

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