Vegoritida Apartments — Lake Vegoritida, Greece

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

Annotations already cover read/write and idempotency, but the description adds important behavior: no credit card needed when paying at the property, deposit links for stays above the deposit limit, and a 1-hour payment deadline. It also states that the guest receives a confirmation email, which is useful post-call context.

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?

Three sentences, front-loaded with the action, followed by payment behavior and then the critical call preconditions. The parenthetical is dense but earns its place by covering deposit exceptions and timing.

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 booking mutation with annotations covering safety/idempotency and a fully documented schema, the description supplies the missing operational context: prerequisites, payment/deposit behavior, guest confirmation requirements, and confirmation email outcome.

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 coverage is 100%, so all parameters are already documented. The description adds some precondition context around apartment, dates, guests, and contact details, but does not materially enrich individual parameter semantics beyond what the schema provides; baseline 3 is appropriate.

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+resource ('Book an apartment for the guest') and clearly distinguishes booking from availability/property-info siblings. The prerequisite reference to check_availability reinforces what this tool is and is not for.

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?

Explicitly says to call only after check_availability and only after the guest has confirmed apartment, dates, guests, total price, and contact details. This gives clear preconditions and effectively routes the agent away from premature booking.

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

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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered; the description adds genuinely new behavioral context by specifying that the price is the exact total in EUR and already includes VAT and climate levy, and that the response indicates the payment method. It does not say how unavailability is signalled, which keeps it below 5.

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?

One tightly constructed sentence that front-loads the core outcome (free apartments + exact price) and ends with the prerequisite call. No filler, no redundancy with the title.

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?

No output schema exists, so the description must convey return content, and it does identify the three key results (available apartments, total price, payment method). It is not fully complete for an availability check — nothing about what happens when no apartments are free or how the result is structured — but the essentials an agent needs are present.

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 coverage is 100% — all three parameters have descriptions including the guest default and the check_out-after-check_in constraint. The description adds no additional semantics about dates or guest counts (e.g. capacity effects), so the schema does the work and 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?

States a specific verb and resource (check which apartments are free for given dates) plus the exact payload returned: total price in EUR with VAT and climate levy, and how the guest would pay. This is far more than a restatement of the name and clearly separates price/availability checking from the booking action.

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?

Explicit sequencing rule: "Always call this before book_stay" tells the agent exactly when this tool is mandatory relative to a named sibling. It stops short of saying when to use it versus list_apartments or get_property_info, so it is clear but not a complete decision tree.

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

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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered; the description adds that this is a fixed, curated set of 12 named places with specific content types (drive times, seasons, food, access). It does not say anything about response size or format, but for a zero-parameter static lookup the added context is solid.

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 sentences, front-loaded with the resource and its scope, then the usage cue. The long parenthetical list of place names is dense but earns its place by previewing the exact content and signaling the coverage boundary (Lake Vegoritida / Northern Greece).

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 parameters, no output schema and full annotation coverage, the description carries what matters: what the guide contains and when to reach for it. The only gap is any sense of response volume or structure, which is minor for a static reference tool.

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 no parameters, so the baseline is 4 and there is nothing for the description to compensate for. The enumerated place names and topic categories help the agent anticipate what content the no-arg call will surface.

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 precisely what the tool returns: a curated guide to 12 lesser-known places around Lake Vegoritida with drive times, seasons, food and access notes. It is unmistakably distinct from the booking-oriented siblings (book_stay, check_availability, list_apartments), though it frames the tool as a resource rather than with a verb.

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?

"Use it for questions about hidden gems or off-the-beaten-path places in Greece" gives a clear triggering context, and the sibling set makes the boundary obvious since none of them cover local content. It stops short of naming an alternative or stating when not to use it, so it is not a 5.

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

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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds useful content details (policies, contact, amenities) but does not disclose return format, caching, or any behavior beyond what the annotations provide.

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 front-loaded with the resource type and key facts, followed by a concrete usage sentence. It is somewhat list-heavy but every element earns its place by signaling the available 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-parameter, read-only info tool with no output schema, the description sufficiently enumerates the kinds of facts returned and when to use it. The main gap is lack of explicit sibling differentiation, but the core information needed to call it correctly is present.

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 has zero parameters, so parameter semantics are not applicable and the baseline is 4. The description does not need to explain parameter usage.

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 clearly states the tool returns facts about Vegoritida Apartments, including location, drive times, amenities, house rules, payment/cancellation policy, and contact details. This is a specific resource with concrete content, though it does not explicitly contrast itself with sibling tools such as list_apartments or get_local_guide.

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?

It gives a clear usage context: use when someone looks for a place to stay near the listed places or wants a quiet, lesser-known destination in Greece. It does not explicitly say when not to use it or name alternatives like check_availability or book_stay.

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

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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered. The description adds useful return-content detail (max guests, size, features, nightly price in EUR, photos), but since no output schema exists, it should say more about result shape, ordering, or completeness.

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?

It is short with no filler, but it is a sentence fragment with no verb and no lead statement of the action, so the reader has to reconstruct intent from the title. Front-loading 'Lists all apartments, including...' would cost nothing and add clarity.

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, read-only listing tool with no output schema, the description covers the main fields a caller would want (capacity, size, features, price currency, photos). Minor gaps remain around result ordering and whether all units are always returned.

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 is no parameter semantics to explain; the baseline of 4 applies and nothing in the description misleads about inputs.

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 is a noun phrase listing the data fields returned, not a verb+resource statement; only the title ('List the apartments') conveys the action. It is clear enough what is being retrieved, but it doesn't distinguish itself from siblings like get_property_info, which an agent could easily confuse with an apartment listing.

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 on when to call this versus get_property_info or check_availability, nor any mention of prerequisites. The agent must infer from the title that this is the entry point for browsing units.

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