Here are a few description options for the WordPress post tag “違約” (breach of contract) in Traditional Chinese, catering to different levels of formality and specificity:

**Option 1: Concise & General (Best for broad use)**

> **Description:** 闡述法律或協議中，未能履行義務或承諾的情況。 (Discusses situations where obligations or promises are not fulfilled in legal or contractual agreements.)

* **Why it’s good:** Clear, concise, and covers the core meaning. Suitable for various content types related to contract law.

**Option 2: More Specific & Formal**

> **Description:** 指在合同或其他法律文件中所規定的義務或承諾未被遵守，導致損失或其他不利後果的行為。 (Refers to the act of not complying with the obligations or promises specified in a contract or other legal documents, which results in losses or other unfavorable consequences.)

* **Why it’s good:** Adds more nuance and hints at potential consequences. Good for legal professionals’ blogs.

**Option 3: Informal & Introductory**

> **Description:** 描述合同、協議等等沒有做到約定的事情。 (Describes situations where the agreed-upon terms of contracts, agreements, etc., are not met.)

* **Why it’s good:** Simplified for a more general audience.

**Option 4: Focused on Consequences**

> **Description:** 因未能履行法律或合同義務而造成的損失或責任。 (The losses or liabilities incurred due to the failure to fulfil legal or contractual obligations.)

* **Why it’s good:** Highlights the impact of a breach. Might be useful to emphasize the negative.

**How to choose the best description:**

* **Content Focus:** Consider the type of content you’ll be using this tag for. Is it primarily legal news, business advice, or general information?
* **Target Audience:** Who are you writing the post for? Adjust the language accordingly.
* **SEO:** Include relevant keywords (e.g., “合同違約”, “法律責任”) to help with search engine optimization. (Though the description isn’t as impactful as the title, it can help.)

**Important Considerations for WordPress:**

* **Keep it relatively short:** Descriptions in WordPress are often displayed in summaries, so keep them concise.
* **Keywords:** Think about keywords your audience might search for when looking for information on this topic.
* The best description should be easy to understand and fit with your blogs style.